Rad Power Bikes RadRunner Review. Rad mini power bikes

Rad Power Bikes RadRunner Review

Who knew riding an electric bicycle could be this fun?! I didn’t!

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The RadRunner is an electric utility bike from Rad Power Bikes, that has been designed so that it can be totally customized. I love modular products because they allow people to buy the base model, and then upgrade with additional extras, as and when needed. This means you don’t have to spend a small fortune up-front; instead, you can wait until you really need the extra features in your day-to-day life.

In this Rad Power Bikes RadRunner review I’m going to share my experiences riding this utility eBike, give an overview of the ebike’s key features, a video review of the RadRunner including acceleration and speed demonstrations, where to buy it, my review summary with pros and cons and an overall score out of 10.

Lastly, I’m going to answer some FAQs about the RadRunner bike and leave you with some more photos of my RadRunner for you to drool over.

Interested in my thoughts on Rad Power Bikes’ folding e bike as well? Read my RadMini 4 review next: RadMini 4 Review: The Folding E Bike That Packs a Punch. Oh and if it’s a stealthy electric commuter bike that you’re after, go read my Ride1UP Roadster V2 Review next, it’s quite the bike!

To read our other electric bike reviews go here: Trail Kale eBike reviews. Grab a cup of coffee (or tea), relax, and enjoy this in-depth RadRunner review.

What’s it like riding the Rad Power Bikes RadRunner?

If you haven’t tried riding an electric bike before then you’re in for a really exhilarating experience. The first time I tried the RadRunner, which also happened to be my first experience with an eBike, I was smiling uncontrollably because of the way it made me feel; like a child again!

Being able to move without pedaling is especially fun, and draws many similarities to riding a motorbike.

The RadRunner electric minibike from Rad Power Bikes is truly thrilling to ride and has so far been 100% reliable. The 48V, 14 Ah Lithium-Ion battery lasts for a very long time (read on for more details on battery life, mileage, and charge time), and for daily usage around town, you’re very unlikely to be left worrying that you need to charge the battery of your ebike at the end of each day.

Most of the time I find myself using only the Rad Bikes RadRunner throttle for riding, without pedaling at all. When I do pedal, however, it’s usually when I pass a pedestrian and slow down whilst pretending to pedal the bike out of courtesy… “manners maketh man” and all that.

There are times when I find myself riding this ebike up steep inclines that I need to assist the 750W Geared Hub Motor by pedaling a little bit, this just provides that extra bit of push the ebike needs to keep moving. I’m talking about very steep inclines though.

There are no standard gears to speak of however which makes this single-speed ebike (there’s only one gear because of how the electric drive chain with a geared hub motor works) a bit awkward and stiff to ride without the power assist activated, but who buys an electric bike to use it as a standard bike?

No one, that’s who, and Rad Power Bikes knows it.

What’s the RadRunner ebike’s riding position like?

The riding position on the RadRunner is pretty good although it would be even better if it was possible to somehow slide the bike’s saddle backward to push my body further from the handlebars. This would make the act of pedaling this Rad Power Bike feel more natural and effortless as a result.

I have a few Rad Power Bike accessories including the very useful passenger seat installed on my RadRunner bike, and use the throttle a lot, so I don’t tend to sit on the saddle itself very often.

Instead, I sit on the passenger seat in a more Harley Davidson-esq riding position. This is so much more comfortable but makes pedaling the bike a little awkward due to the saddle getting in the way.

Are the RadRunner’s handlebars comfortable?

Yes, the handlebars on the RadRunner eBike are comfortable and this is due in part to the flattened shape on the ends of each handgrip (seen in the image above). The flattened shape allows you to rest your palms comfortably around the handlebars.

How stable is the RadRunner bike when riding on different surfaces

Due to the fat tires on the RadRunner Kenda K-Rad 20″ x 3.3″ wheels, this RadRunner bike is very stable on gravel and dirt trails, often a surface that bikes can tend to slip out on while cornering at speed.

These wheels with K-Shield puncture-resistant liners provide a predictable response, ground feel, and offer up tons of confidence when you’re riding the RadRunner, even at higher speeds.

The RadRunner eBike does not have suspension forks which is a definite downside to the smoothness of the ride (BUT THERE’S A SOLUTION!)

The ride is on the RadRunner electric bike is very solid due to the lack of suspension. The only cushioning comes from the tires and saddle, which is pretty comfortable to sit on for long rides.

To get a smoother ride, however, you should probably look at the RadRunner eBike upgrade called the ‘RadRunner Plus’ – there’s a little bit more on why that bike could be worth the extra investment if you want a smoother, more comfortable ride on any surface that isn’t a smooth road.

WANT A SMOOTHER RIDE with additional extras and suspension? The RadRunner Plus is the ultimate RadRunner UPGRADE!

There’s hope however for a smoother ride as Rad Power Bikes have released an alternative RadRunner bike called RadRunner Plus for 1,799. Some additional features on the RadRunner Plus ebike include:

  • Front suspension fork for smooth rides outside the city and on the trail bike paths.
  • A 7-speed drive train to make much easier work of hills.
  • Passenger package comes as standard – this includes the long rear seat that I bought as an additional extra for my bike and retractable footrests.
  • Full fenders are as standard – The front fender you see on my bike was bought as an added extra.
  • A premium headlight that is larger and brighter than the one on the RadRunner.
  • An LCD Screen – The backlit LCD display helps you to keep an eye on your stats while riding. Not only does it track your speed and distance, but with a 5V, 1 Amp USB port, you can keep your devices charged while you’re on the go. That may well be worth the RadRunner upgrade price in itself for some.

How noisy is the RadRunner eBike?

The RadRunner ebike itself runs fairly quietly but not silently, which is to be expected from a bike that runs off a 750W motor. To get an understanding of the level of noise, check out my video at the bottom of this RadRunner review.

RadRunner ebike review: key features and specifications that matter to me

RadRunner’s Battery Power and Life: A Powerful 48V, 14 Ah Lithium-Ion battery

You can get a lot of usage out of the RadRunner‘s 48V, 14 Ah Lithium-Ion battery. It’s rated for 800 charge cycles which is impressive when you consider the battery has the capacity to take you up to 45 miles on one charge with a top speed of 20mph.

The RadRunner onboard battery takes 5-6 hours to charge fully and because it’s a Lithium-Ion battery, it holds its charge for a long time while you’re not using the bike.

At only 7.7 lbs, the RadRunner bike battery is also one of the lightest and most energy-dense packs on any electric bike.

They also sell battery packs separately on the Rad Power Bikes website, which means you can buy a spare one if you live a lifestyle which means you need to ride further, or for longer.

The RadRunner’s compact 750W hub motor

With 750W and 80 Nm of torque at your disposal, the RadRunner electric utility bike’s geared hub motor really helps power you up steep inclines/hills and gets you up to the RadRunner top speed of 20MPH very quickly from a dead stop.

This is demonstrated in my video at the bottom of this RadRunner review. All this while remaining relatively quiet and inconspicuous.

Numbers like these aren’t even found on some of the most expensive mid-drive eBike systems out there, which for the price of this bike is incredible.

There’s definitely a converging point whereby a steep incline and overall weight of the bike rider meet. If you live somewhere with a ton of hills it may be worth looking at the RadRunner upgrade which I mentioned earlier in this RadRunner Review due to its 7-speed drive train.

The RadRunner’s LED control panel with battery charge indicator and adjustable power-assist modes

I love the simplified LED control panel on the RadRunner. It’s small and doesn’t require a PHD to operate.

It’s literally one-click on and one-click off, with additional buttons for lights and pedal assistance, and LEDs to indicate battery and assist levels. I demonstrate these features in my video below.

Rad Power Bikes’ Passenger Package

One of the really great things about the RadRunner ebike, and other Rad ebikes, is all the Rad Power Bike accessories you can purchase, that effectively give your eBike an upgrade. I particularly like how the RadRunner center console makes the bike look like an old-style Honda classic motorbike.

Other eBikes with bench-style passenger seats all have one thing in common: they offer no means for the primary rider to adjust the height of their seat, which can lead to a poor riding position.

The RadRunner is the very first e-bike or scooter to have an adjustable driver’s seat that can either be completely flush with the passenger’s seat or adjusted higher like a standard bike.

As I mentioned earlier, I like to ride on the passenger seat when riding solo, so I leave my seat in its lowest position. If you think these Rad Power bike accessories will be useful for you, consider getting the RadRunner Plus which ships with many of these accessories.

Rad Power eBike Lights: Be seen at night with included lights and reflective detailing

The RadRunner ebike comes with lighting as standard, and the front headlight has an ambient light sensor that allows it to dim/brighten automatically – both front and rear lights are very bright at maximum.

There’s also an integrated brake light with strobe for extra safety when you are riding on the roads, which I love! The tires also have reflective detailing in their sidewalls which keeps you visible from the side.

Wide/fat tires make for a stable ride on the Rad Power eBike

The tires on the RadRunner ebike are nice and wide, and while maybe not the most efficient for riding on the roads, do offer excellent stability and grip on bike paths and off-road areas. Even while riding fast on gravel paths the bike feels stable while making turns.

After riding a road bike for many years, I have come to hate gravel because a slim front wheel can very easily slide out from under you while taking corners at speed on these types of loose surfaces. This is far less likely to happen on Rad bikes with fat tires.


The RadRunner bike is a heavy bike, so having a dual-leg kickstand is very useful when you need to step away from the bike. It’s very sturdy and has no problem holding the bike’s weight.

A Bell

A bell comes preinstalled on the left handlebar, it’s pretty cute and does what you’d expect, alert other riders and pedestrians of your arrival.

Where to buy the RadRunner ebike

You can buy the RadRunner eBike, RadRunner Plus, and all additional extras at the Rad Power Bikes online store. They have great stock and offer next business day shipping, so you’ll be riding before you know it!

The RadRunner Rad Power Bikes price is 1,299 (base unit) which in my opinion is excellent value for money for what you get.

Frequently asked questions about Rad Power Bikes and the RadRunner eBike

How fast does it go? What is the RadRunner top speed?

Up to 20mph depending on the road surface, incline, and weight of the rider. It also depends on whether there are two of you riding it, or just one.

How far can the RadRunner bike go on a single charge?

20-45 miles depending on road surface, incline, and how much power assist and throttle you use.

Where are Rad Power Bikes manufactured?

Rad Power Bikes are designed in Seattle and made in China.

Are Rad Power Bikes Waterproof?

According to the Rad Power Bikes support forum, the components on ebikes by Rad Power Bikes are all water resistant and designed for water to drain off the components from top to bottom, so never flip the ebike over when wet

Images of the Rad Power Bikes RadRunner

I hope you enjoyed this RadRunner review, if you have any questions for me about the bike, please leave them in the Комментарии и мнения владельцев below. Happy riding!!

Hey, I’m Alastair and I’m totally obsessed with discovering the latest, greatest coolest gear for outdoor pursuits. Learn more about Trail Kale, and everything we stand for as an outdoor gear healthy foods publication.

Rad Power Expand 5 Review – An In-Depth Look

Rad Power is currently the largest e-bike manufacturer in North America.They’ve climbed to the top of the e-biking world thanks to their affordable yet quality e-bikes. They’re so successful in fact that they’ve recently expanded their operations to Europe.

The RadMini was already a pretty decent electric bike offering a fantastic mix of mobility for daily commuting and offroad fun. Now, the Expand 5 improves on all these characteristics. while also delivering better ergonomics and frame stability.

Some of the key upgrades include a step-through frame, which makes it suitable for riders of all heights and adjustable handlebars.

That’s merely the tip of the iceberg upgrades-wise, though. The frame features a ton of small details that make it one of the most ergonomic and easy-to-store e-bikes you can find on the current market.

power, bikes, radrunner, review

But, before we get into the nitty-gritty details, let’s take a look at the specs:


The frame is the single most vital component of any bike. That’s why most improvements from the RadMini have been made on the bike’s frame.

Unlike the previous version, Expand 5 now boasts a step-through frame design. That allows for easy mounting. no matter your height. However, this does lower the max height of the rider to just 5’ 10’’. but you can opt for a more extensive seat post.

Speaking of rider height, Expand 5 comes with another upgrade that ensures superb comfort. adjustable handlebars. Previous versions of Rad Power’s foldable e-bikes didn’t come with this critical feature. Now you can rotate the handlebars to hit that comfort sweet spot. Still, this doesn’t make the ride more comfortable if you’re taller than six feet.

That is why some people had trouble adjusting the bike to be more comfortable. Now you can rotate the handlebar in or out for the ultimate riding experience.

The Expand 5 is pretty light for a fat-tire foldable e-bike, too. That is because the frame is built out of lightweight. but durable. 6061 aluminum. The frame is extremely sturdy and even comes with reinforcements for the headset joint and the joint between the downtube and the chainstay.

That ensures the e-bike can handle all types of terrain with minimal risk of breaking. which is always good to hear.

Another improvement upon the RadMini is the addition of a rear cargo rack. The rack is built out of steel, which adds weight but makes it extremely sturdy. The maximum carrying capacity for it is around 60 pounds.

Additionally, the rack comes with all kinds of small details that make it extremely useful, such as child seat mounting points. and even bungee cord slips. The cord slips are a bit rough and will cut into the cord so I recommend you file the slips down and apply a fresh coat of paint.

If one rack is not enough for you, you can also purchase an additional front rack. The Expand 5 comes with mounting holes and screws, so all you have to do to install the front rack is screw it in. Unfortunately, since there is no front suspension you can expect the cargo to rattle quite a bit during the ride.

Rad Power offset this by including larger tires, but that doesn’t make up for the comfort that a good front suspension would provide.

Another detail I love about this Rad Power bike is the cable routing. Although this is a foldable bike, all the routing is done through the downtube. That makes the e-bikes frame lines sleeker and prevents the cables from getting cut or damaged by accident.

Since this is is a folding e-bike, let’s talk about the folding mechanism a bit.

The bike is held together in the middle by a bulky steel buckle. This buckle is pretty robust. and won’t budge no matter what you do to the bike. The story is the same for the handlebar.

There’s a standoff welded to the bottom of the bottom bracket shell to ensure the bike doesn’t scratch while it’s folded. This standoff essentially acts as a kickstand when your electric bike is completely folded.

On that note, the Expand 5 measures only 29 x 25 x 41 inches when folded. That means that even if you have little to no place for storage, you won’t have much trouble storing this e-bike.

The only thing I don’t like about the frame design is the lack of front suspension.

Rad Power offset this by including larger tires, but that doesn’t make up for the comfort that a good front suspension would provide.


The Expand 5 comes with a 750-watt rear hub motor, which provides more than enough power to go over just about any type of terrain.

On top of all that, the motor is also pretty torquey. The moment you push on the thumb throttle, you’ll feel the motor’s power. In just a matter of seconds, you’ll be cruising at a top speed of 20 miles per hour.

You get to control the motor’s functions via the control hub located on the lefthand side of the handlebar. The control hub is pretty basic, though. It comes with a small LCD screen showing the current battery charge and your speed.

There are dedicated buttons to switch between five levels of pedal assist and buttons for the light. There are no advanced features, such as milage meters or a range indicator.

I would say that Rad Power could’ve added a bit more features to the controller, but that would probably increase the e-bike’s price. For 1299, this bike has more than enough motor control features.


Rad Power Expand 5 comes with a 672 Wh battery that provides you with around 45 miles of range. And sure, the charging time of 6.5 hours isn’t ideal, but it makes sense when you factor in the price.

Although the battery isn’t something to write home about, the way Rad Power built it is rather innovative.

You see, most e-bike batteries come with an integrated motor controller. Unlike other e-bikes, the Expand 5 comes with a separate motor controller. This feature reduces the cost of the battery significantly. which means replacing the battery isn’t such a big deal.

During my tests, the bike’s range was around 30 miles, which is impressive for a budget-friendly e-bike. Just keep in mind that the range drops off significantly when driving over dirt roads.

You can expect around 20 or so miles if you take this bike on an off-road adventure.

Brake Type

Rad Power Expand 5 comes with 180-millimeter disc brakes. They’re your standard mechanical brakes. and seem pretty responsive no matter how dry or wet the conditions are.

I love how easy they are to adjust, too. Instead of using tools, you can easily tension the cable by rotating the bolt where the line goes into the brake.


The rims fitted on the Expand 5 are nothing less than heavy-duty. They’re made of double-wall aluminum that measures 60 millimeters in width.

The spokes are just as heavy-duty as the rims. In fact, this e-bike comes with 36 spokes built of 12-gauge stainless steel.

Needless to say, the rims can take everything you throw at them. and more.


The Expand 5 doesn’t come with front suspension, so Rad Power offset this by including bigger tires than on the previous models.

This e-bike comes with 20 x 4-inch puncture-resistant tires you can inflate or deflate. depending on the kind of terrain. But again, note that the range of the e-bike drops the more you deflate the tires.

Post Test Summary: Rad Power Expand 5 Pros And Cons

Based on everything said above, what impressions does the Expand 5 leave on you?

In my honest option, the Expand 5 is one of the best budget-friendly bikes you can find on the current market.

Not many e-bikes in this price range offer this much versatility and comfort. You can use it for both daily commuting and weekend adventures. And since it’s foldable, you’ll have no trouble fitting it into your car trunk or in your home.

Additionally, the 750W motor provides more than enough torque to make the riding experience incredibly fun.

Plus, not many bikes in this price range come with heavy-duty cargo racks.

The only thing I don’t like about this e-bike is the lack of front suspension. Sure, you can deflate the tires. but that comes at the cost of decreased range.

What I Liked About Rad Power Expand 5

Based on my time with this bike, there’s very little not to like about it. The riding experience is super smooth. Although there’s no front suspension, the tires absorbed most of the road bumps. The offroad ride was a bit rougher but not uncomfortable.

I especially love Expand 5’s folding feature. When folded, this e-bike barely takes any place. Even if you live in a tiny apartment you won’t have any trouble storing it. The same goes for anyone with limited trunk space.

What I Didn’t Like About Rad Power Expand 5

The only thing I didn’t like about this bike is that it doesn’t come with a large LCD display. I don’t like it when I have to guess how much battery charge I have left.

Sure, you can buy an LCD display upgrade, but it would’ve been nice if it came with the stock model.

Another thing I don’t like about this bike is the rider height limitation. If you’re anywhere from 5’ 10’’ you will start to cramp after a couple of miles.

If you decide to assemble this bike yourself you will have a hard time installing the fenders. The fit is so tight that it’ll be nearly impossible to not scratch the paint.

Lastly, I don’t like the lack of front suspension. The fat tires are pretty good at absorbing road shock, but the second you hit an offroad trail the bumps will make the ride almost intolerable.

RadExpand 5 Review: Rad’s New Affordably Priced Folding Ebike!

If you think this ebike looks familiar it’s because it does. The RadExpand 5 is the next generation folding ebike in the Rad fleet. It takes cues from the RadMini Step-Thru 2 but with a brand new name and some slight changes. Let’s jump into our RadExpand 5 review.

RadExpand 5 Review – Component walk-around, Top Speed, and Hill Climb Test

Changes from the previous generation RadMini

While the RadMini (currently 1,499) will be phased out, it’s helpful to call out the changes that have been made. The RadExpand 5 will only be offered in a step-thru variation. This allows for more accessibility as well as a cleaner look than the old high step RadMini.

Next, there is no longer a suspension fork but instead Rad has gone with 4″ wide tires (up from 3″) to help cushion your ride. Lowering the pressure on the fat tires will help soak up bumps even more – the difference is noticeable.

The lack of front suspension also helped the bike lose some weight – 5 lbs to be exact (6.5 lbs when compared to the RadMini Step-thru). The RadExpand 5 weighs 62.5 lbs or just 55 lbs with the battery removed. And while it might not sound like much, these extra pounds matter, especially if you’re lugging your ebike in the back of a vehicle or just moving it around frequently.

Rad also changed the handlebars to BMX-inspired ones that adjust forwards and backward instead of up and down. This will be especially nice for shorter riders and those with shorter arms.

One surprising change is the RadExpand 5 now comes with the rear rack with a 55 lb capacity. The RadExpand rack is compatible with all of the great cargo accessories that Rad Power Bikes offers but is not compatible with the Thule Yepp Maxi child seat.

Finally, the RadExpand has an LED display as opposed to the LCD display. This is the same LED display found on the RadMission and RadRunner 2. Note that you can upgrade to the monochrome LCD display for 99.

Check out our comparison below and move the slider to get a closer look at the RadMini versus the RadExpand.

RadExpand 5 Motor and Battery

Leveraging the same 750 watt peak motor found on many of the Rad Models, the RadExpand 5 can reach speeds up to 20 mph while using throttle or pedal assist (Class 2 ebike). Like all Rad Power Bikes models, the bike comes equipped with a right-hand twist throttle.

The RadExpand 5 comes with the shark style 14 Ah (672 watt-hour) externally mounted battery. We really like the battery position in front of the seat tube because it is easy to remove and replace when you need to charge. The controller is mounted behind the seat tube, opposite the battery. Because the electrical components are mounted externally, this will make any future repairs easier (though it doesn’t look as clean compared ebike with an integrated battery and controller).

Frame and folding

In my opinion, the main selling point of the RadExpand 5 is the frame design. There’s a reason the RadMini was one of the more popular Rad Power Bikes models. Because of the RadExpand’s step-thru design, the standover height is just 16″. Rad Power Bikes recommends this ebike for riders 4′ 10″ – 5’10”. This makes the RadExpand 5 the most accessible ebike in the Rad lineup. It has a total payload capacity of 275 lbs.

What’s great about any folding ebike is the ability to store it in tight spaces and transport it without an ebike rated rack. The RadExpand folds down to 28″ x 25″ x 41″. We recommend purchasing a large tote with handles to transport the RadExpand 5 since this makes it easier to load and unload. When folded, the RadExpand 5 has a built-in stand that prevents the bike from falling over. A sturdy latch holds the frame together at the bottom of the frame.

Check out the full geometry specifications on the Rad Power Bikes website.

Rad Expand 5 Drivetrain and Brakes

The RadExpand 5 has mechanical disc brakes that Rad Power Bikes has been using for years on their electric bikes. The levers feel great as far as mechanical disc brakes go, and most importantly they function well. You’ll also find a 7-Speed MicroShift RD-M26 rear derailleur on the RadExpand 5. The derailleur is paired with a Microshift under-bar-mounted thumb shifter.

Other Included Accessories

Besides the rear rack, the RadExpand 5 includes front and rear plastic fenders. For increased safety, you’ll find an integrated front light that mounts to the front fork and in the rear another integrated light that mounts to the rear rack. The tires have reflective sidewalls for increased visibility. Check out Rad’s full lineup of compatible accessories to see how you can customize it to make it your own.

RadExpand 5: Is it a Buy?

The RadExpand 5 packs a lot in and in some ways builds on what was already one of the best affordably priced folding ebikes on the market. Some might miss the front suspension but the ebike is now lighter because of it. Electric bikes can be unwieldy for some so it’s great to see Rad FOCUS on removing weight while not compromising on battery capacity and motor power. Finally, we like the inclusion of the rear rack and the improved handlebars. See the full specs of the RadExpand 5.

RadMini 4 Electric Folding Fat Bike Review

It’s time to talk about the RadMini 4 Electric Folding Fat Bike. Every time I dive deep into a particular bike for one of these reviews it’s an opportunity to learn. I get to do the kind of research that lets me really know what a product is all about. When it’s a good product, as is normally the case if you are reading my thoughts about it, then I get really excited about it.

That was definitely the case with the recent Tern models. The Tern bikes are amazing but I know the pricing isn’t going to work for everyone. If you like the idea of what Tern is offering but you need something a bit less expensive the RadMini 4 Electric Folding Fat Bike might be a great idea.

Rad Power Bikes is a company born from necessity. When the Founder and CEO Mike Radenbaugh needed a way to take on his 16-mile commute to school, he found a solution.

That early innovation went on to evolve into the biggest ebike brand in North America. Given that story, it’s no surprise that Rad Power Bikes is a company all about solutions that work for everyone. Let’s take a look at the RadMini 4 Electric Folding Fat Bike and see what makes it the bike it is.

Geometry and Sizes

The RadMini 4 Step-Thru and the standard version are the same other than the variation in a frame shape.

Like all bikes, the place to start is with a solid and well-built frame. The RadMini 4 represents two different models. The two models are virtually identical other than a dropped top tube for the step through version. I’m not actually going to reference the models as different other than to say that the two options do exist.

If you want the extra versatility of an easy step-through design then that option is there for you. Other than that detail the two are the same. I would say in most cases the easier step-through design is the option that makes the most sense but everyone has different needs. Choose whatever is going to work for you without hesitation.

The frame material of choice for the RadMini 4 is 6061 aluminum.

I’ve talked about this material choice for other bikes but I can mention it again here. Aluminum is an excellent option that keeps the price in check. It’s cost-effective and easy to work with while giving up nothing when it comes to performance.

When it comes to the top-of-the-line race bike designs there’s some small amount of weight savings with a carbon fiber option. For a fat-tired folding bike, aluminum is the best option.

When it comes to sizing the frame for the RadMini 4 is 16 inches (40.64 cm). Rad Power Bikes lists the geometry measurements as 16.5″ Seat Tube Length, 18″ Reach, 28″ Stand Over Height, 32.5″ and Minimum Saddle Height of 27.5.”

The total length of the bike is 68″ with a wheelbase of 45″. Folded dimensions are 41″ x 22″ x 28″ (L x W x H). Like all folding bikes though the seat tube length has little to do with the usable fitment.

The Radmini 4 is a one-size bike. Rad Power Bikes handles fitting based on leg length and lists a large range of useability. The ideal leg length is 28″ to 32″ inches with a note that at these leg lengths “you will be able to pedal and stand over the frame comfortably”.

It’s not all lost if you are a bit shorter and have a leg length in the size range of 24″ to 28″. Rad Power Bikes says “you will be able to pedal comfortably but you may not be able to stand over the frame without it contacting your body.”

In order to measure properly, Rad Power Bikes has detailed instructions for what you are measuring and how to do it. Leg length is going to refer to what Rad Power Bikes calls “your real inseam.” They call this “the distance between your body where it sits on your bike saddle and the ground” and specify that it’s not the same as your pants inseam. To measure this detail, there is a process.

Direct from Rad Power Bikes, “Wearing your regular riding shoes and with your back to the wall, stand with your feet spread so there are about 7 inches between them. This is about the distance apart your feet would be when straddling a bike with your feet on the ground (standover height).

Place a hardcover book against the wall with the spine of the book facing upward. Slide the book upwards towards your groin until it is solidly against your body. This may be a bit awkward, but is way more comfortable — and safer! — than trying to ride a bike that is too big.” Then just measure from the top of the book to the ground.

RadMini 4 Motor and Battery

The electric-assist system on the RadMini 4 Electric Folding Fat Bike is sourced from Bafang. Bafang is a well-known electric motor company based in Suzhou, China. For many people in Europe and the US, the name isn’t the most well-known.

Despite a smaller name recognition in some markets, Bafang is still a serious contender in the world of electric bike motors. The name represents a history of innovation since 2003 as well as 700 people in 5 locations all over the world.

power, bikes, radrunner, review

In this instance the motor system that Rad Power Bikes has employed is unique. They have partnered with Bafang to create something just for the RadMini 4.

It’s a 750watt system housed in the rear hub. Torque sits at 80Nm and delivery of that torque gets metered through a 12-position cadence sensor or a twist throttle with a max speed of 20mph. The motor specs are impressive and should provide plenty of power for whatever you need.

To support the impressive motor specs there’s an equally robust battery.

power, bikes, radrunner, review

It’s a large 672Wh 48V, 14 Ah Lithium-Ion Battery with a quoted range of 25 miles (40 km) up to 45 miles (72 km) and a 6-hour charge time. To check how much battery life the bike has at any time check the grayscale 2.75″ LCD sourced from King Meter. Choosing one of the 5 assist options with less assist will extend how many miles you can cover.

RadMini 4 Components

Flip over to the traditional bike side of things and it’s a little more of a mixed bag. The Bafang system put to use for electric assist does provide some cost-saving but also carries impressive specs. The mechanical bike components are somewhat less impressive on the spec sheet.

Fortunately, in this use, they should do a great job even if the numbers don’t sound as impressive.

At the rear hub is a 7-speed freewheel with 11-34 gearing. On most bikes since around the mid80’s the freehub with Shimano compatibility is the standard. A freehub uses splines and it slides onto the wheel hub. Alternatively, a freewheel uses threads on the hub. For an inexpensive 7-speed drivetrain, it’s unlikely that it’s going to make much difference.

One challenge that can arise with a freewheel instead of a freehub is max gearing. Rad Power Bikes has put Shimano mountain bike components to use and sidestepped this issue. The rear derailleur is a Shimano Altus unit that represents one step up from the entry-level Tourney lineup.

The steps between gears on a 7-speed drivetrain are going to be a little on the large side but the choice of a 34-tooth max cog is a good one. Combined with the 48-tooth front chainring and the Bafang system I would not anticipate hill-climbing issues.

The braking system of choice on the RadMini 4 Electric Folding Fat Bike is from Tektro. The lever is an aluminum alloy comfort grip with a motor cutoff switch and integrated bell. At each wheel, there’s a huge 180mm rotor that should provide plenty of stopping power.

The caliper grabbing those large rotors is a Tektro Aries (MD-M300) cable-actuated caliper.

Although I’d love to see a hydraulic brake system put to use here the MD-M300 is a quality system built from a single-piece aluminum body. The biggest challenge with cable pull disc brakes is always pad adjustment. To help with that the MD-M300 features Automatic Caliper Centering (A.C.C), Inside Pad Adjustment, and Automatic Pad Angle Adjustment.

When it comes to stopping the bike there’s nothing to worry about and these features should help the rest of the experience.

Other Components

Not all the features of the RadMini 4 electric folding fat bike fit neatly into other headers but they are worth mentioning. At the front of the bike, a stem is a folding unit that helps make the folded RadMini 4 compact. When it comes to the riding experience though it’s the telescoping nature of the stem that is worth mentioning.

It’s not unusual for folding bikes to use this design and it’s important that it’s there to make sure the bike will fit a range of riders.

Along with the telescoping stem, the front of the bike features a suspension fork. The unit Rad Power Bikes uses has 60mm of travel as well as preload adjustment and a lockout. The preload adjustment will, again, help set the bike up in a way that fits you and your body. Then if you need to save a bit of energy lost to the movement you can lock it out.

Being a fat bike the RadMini 4 sports massive tires. Low pressure will help keep the bike feeling supple even if you don’t want to use the suspension.

As far as accessories there are a few included and a bunch of great options available. On the included side of things, there’s an integrated rear light, front light, and fenders at both ends of the bikes. Not included, but available, are solid front and rear racks that should let you make use of that impressive cargo capacity.

Assembly of RadMini 4

Like most bikes the RadMini 4 Electric Folding Fat Bike comes in a box mostly assembled. Once you’ve got the bike unpacked the assembly needed is minimal. It includes the pedals, the handlebars, the fenders, the front light, and the front wheel. All of the tools needed come in the box and the instructions are clear. If you’d like more info check out the RadMini 4 Assembly Instructions below.


I tend to downplay how much people will actually get off the beaten path with the various electric fat bike options. People often surprise me but I’m going to downplay the possibility again. A folding electric fat bike seems even less likely to find use on sand or snow.

That’s okay though, the large tires mean a cushy ride no matter how broken the pavement might be. Don’t be afraid to buy a RadMini 4 and cruise around the city.

There are a ton of great things about a bike like the RadMini 4. Fat bikes take up a lot of space but because it folds it’s going to be much more usable with a small apartment. The large tires mean not only a cushy ride but also a stable ride. My favorite part about the RadMini 4 is the cargo capacity.

It’s an inexpensive option that lets you carry all the groceries you might need to then folds up when you get to your house. There’s a ton of utility and a great price.

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