Heybike Mars Review: An Affordable Fat-Tire E-Bike. Hey bike electric bike

Heybike Mars Review: An Affordable Fat-Tire E-Bike

E-bikes are all the rage these days. There are a million options, ranging wildly in price. From the 12,000 e-mountain bikes to the classic 1,500 Rad Runner, you should be able to find an e-bike that fits your budget. But, depending on where you’re at, 1,500 can be too much. With that in mind, when the people at Heybike hit me up to test out the Heybike Mars, a foldable e-bike with fat tires that costs under 1,000, I thought I should hop on it. Literally. So, after a few weeks of buzzing around on the Heybike Mars, which clocks in at 949 USD, here are my thoughts.

Pros: Cons:
Easy to assemble Takes nearly 7 hours to charge fully
Fast acceleration Rear rack only supports up to 100 lbs
Foldable to fit in most car trunks Battery weight of 9.35 lbs
One of the most affordable e-bikes at 949 Awkward to carry when folded
Relatively light at 66 lbs. (without the battery) Slow using pedal power only
Fat tires at 20″x4″

First Impressions:

When the Heybike Mars showed up in its box, I was pleasantly surprised at how small the box was. I knew the e-bike was foldable, but I didn’t know how small it might fold down to. Once open, I realized that the Mars only required a few things to become ridable. Simply unfold the bike, add the seat, pedals, and handlebars, then insert the battery, plug a few odds and ends in, and you’re ready to ride for an advertised range of up to 47 miles with pedal assist. Using the battery only, Heybike claims you’re looking at about 37 miles. I, however, didn’t get that far. Without pedaling (because, let’s be honest, that’s what matters when it comes to an e-bike), I was able to ride for a little over 26 miles — still a decent amount of road.

Best For

This bike hits the sweet spot for trips to the beach or store, especially for someone who doesn’t have a lot of storage. The Heybike Mars easily folds up to 94×38×74 cm, which will fit just about anywhere. The fat tires along with the front suspension make this e-bike a breeze to ride on dirt paths, gravel, or a paved road. If you’re heading to a place that requires a vehicle to get to as well as a long hike in, the Heybike Mars is a good option.

Notable Features

The Heybike Mars e-bike has a 500-watt rear hub motor, which is pretty standard for a class 2 e-bike. A seven-speed derailleur with thumb controls helps the rider (and the battery) properly shift into the correct gear to both save the rider’s energy and the battery’s. When in the correct gear, the rate at which the Heybike Mars gets up to speed is surprising, as is the top speed. Using throttle only, it can get up to 20 mph on a flat road, which is plenty fast enough to get you where you’re going.

The bike has a key that turns the battery on, a nice security feature. It’s capable of being ridden without the key, but then it will just be a plain old bike. To engage the battery, simply turn the key to the on position, then hold the on/off button on the display on the left handlebar. The display wakes up, and you’re off to the races. Also of note: there’s a USB port on the battery, so you can use it to charge other things.

With front fork and seat post suspension, the Heybike Mars is a smooth ride. Photo: Heybike


The Heybike Mars came with a few little extras that make a big difference: a solidly built rack on the back that holds up to 100 pounds — which isn’t quite enough to throw a friend on the back for a double — and front and rear lights. The front light is surprisingly bright. Front fork suspension is complemeted by seat post suspension, which makes the Mars a very smooth ride. There are also a plethora of upgrades to choose from including panniers, saddle bags, and baskets.


Although the Heybike Mars is a great value e-bike, it’s not without its faults. That’s something to be expected when looking at the more affordable side of things, however. One of the most obvious missing things is the lack of regenerative braking, a feature that some more expensive e-bikes boast. Also, when using the pedal assist function, I found there was a slight delay before the assist engaged. Nothing huge, but enough to notice, especially at higher speeds.

In Summary

The Heybike Mars is a great little e-bike for the budget conscious. Because of its fat tires, it’s capable of mostly all-terrain riding. Where it shines, though, is on short trips in town or around the neighborhood. It comes with a rack on the back strong enough to put something up to 100 pounds on. When it comes to bang for your buck, the Heybike Mars is a great option for the e-bike rider who doesn’t want to take a second mortgage out to afford one.

Additional Specs

Recommended height: 5’3″-6’3″ Load capacity: 330 lbs. Handlebar Height: 47″-52″ Stand Height: 26″ Top Tube Length: 23″ Battery: 48V 12.5Ah Rear Rack Size: 40.5×14.5(cm)

Editor’s Note: For more gear reviews and features on The Inertia, click here.

Heybike Sola Review: What Emotions Did I Get From this E-Bike?

If someone tells me they’re afraid of electric bikes but have ridden bikes before, I believe they’ve ridden a bike that looks like the Heybike sola from Heybike. Every direct-to-consumer electric bike manufacturer offers a model with comparable parts, a similar frame design, and a similar price point that is marketed as an entry-level, budget-friendly bike.

That this is regarded as an entry-level electric bike always surprises me. In theory, it seems logical to have a relaxed beach cruiser with a comfortable seat and large, fat wheels, but in reality, it weighs 48 pounds and has an electric engine attached to it! Your once-comfortable, light vehicle is now bulky and cumbersome. It is challenging to adjust the appropriate level of assistance using a less sophisticated computer. There is no way to adequately brace yourself. It’s a little unsettling to jolt around on what is essentially an e-motorcycle.


Still, considering the genre, Heybike’s rendition isn’t awful. It boasts a robust 500W rear hub motor that will propel you up challenging hills, built-in lights, a kickstand, a rear rack with a 150-pound capacity, and an incredibly long-lasting battery. However and this is difficult to say especially in light of Molly Steinsapir passing on a bike like the RadRunner 2, this is not the bike I would suggest for a beginner or a smaller rider.

Heybike Sola: Design and Build Quality

The internal electronics are hidden by the inside metal frame of the big-looking Heybike Sola bike. I’m on the step-through style, which is still just a little bit too tall for me at 5’2″ (Heybike says that the minimum height for a rider is 5′, although I do have short legs). It comes in two different forms, a step-through and a step-over. Both models have curved cruiser handlebars that let you sit upright with your elbows relaxed and your butt securely planted on a big, soft seat. They both weigh 65 pounds.

The Heybike Sola has eight gears and a straightforward chain-driven Shimano shifting system. Instead of using a torque sensor to activate the motor, the computer activates assistance when it detects that you have started pedaling. The amount of help decreases as you pedal more quickly. Instead of a torque sensor, which produces more power the harder you pedal, it functions more like an on-and-off switch.

It does include features that are necessary for commuting, which I once thought were luxuries, but now find offensive if they’re not included in the package: Standard features include fenders, a kickstand, a rear rack with add-ons, and integrated lighting. I hardly even noticed when the front headlight was on because, at 50 lumens, the lights are more for other people to see you than for you to see anything in particular. You probably want a light that has between 100 and 200 lumens for an everyday city commuter.

Speed, level of help, and power output are all shown on the large, vivid LCD display, and the buttons are simple to press even when wearing gloves. The extras, such as the passenger kit, are cozy and safe.

Heybike Sola: Motor and Battery

It has a lot of power for a bike that is so reasonably priced. It has a rear hub motor that is 500W and offers five levels of assistance. It can go up to 25 miles per hour because it is a Class 3 bike. It has a left-side thumb throttle that can provide an additional 21 mph of assistance, but I was able to quickly get over 21 mph by pedaling.

Comfort is crucial for a bike that will be used largely for commuting. A comfortable carriage makes each ride just a little bit more enjoyable, whether you’re traveling on choppy roads or waiting for a light to change.

The Heybike Sola is a bike that is typically pleasant but perhaps not quite ideal for every circumstance, keeping these use cases in mind. With luxurious padding and a faux-leather finish, the Selle Royal saddle really looks the part and feels appropriately pricey as a result.

But, this sensation doesn’t fully equate to total comfort while driving. Because the bike lacks suspension, you will feel every pebble and uneven surface, which could put some people who live in older cities off. The seat makes an effort to dampen rumbles and vibrations, but it falls short of completely eliminating them. The consequence is a ride that is generally comfortable but incapable of adapting should the circumstance alter. Unfortunately, it’s expensive.

In order to combat this, the Heybike Sola also incorporates hydraulic disc brakes with an electric cut-off sensor, which turns off the motor when you depress the brake pedal. Depending on the rider’s weight and the terrain, the battery’s advertised range of 75 miles is a 48V 12Ah battery with Samsung cells. I rode it about my area for two weeks, covering distances of 1 to 2 miles, and I hardly noticed the battery level dropping at all. I weigh around 115 pounds.

Years ago, when I test-drove the Aventon Level, I questioned the need for front wheel suspension and huge, fat tires on a casual cruiser. But that was before I tried to exceed the speed limits on a cruiser that has a top speed of almost 25 mph.

It’s absurd! Imagine having LeBron James’ strength and speed combined with a kindergartener’s coordination. You would sprint, begin to sway, and collide with something. Without large tires and suspension, you’re toast if you hit a pothole at 25 mph while using these curved handlebars. The handlebars on Vespas are also straight.

Everyone who has ridden a geared bike in the last 15 years is intimately familiar with the Shimano shifting mechanism. It moves back and forth quite nicely. On the other hand, I can gear fairly precisely on my daily bike because it has a Bosch motor with an integrated Enviolo hub. The Heybike Sola’s Bafang motor is louder, thus it was much harder to tune the right gearing with the appropriate amount of motor assistance. In the end, I mostly just used the throttle.

That’s okay. Doing errands in my neighborhood, where pretty much everything I need is within a mile of my house, requires a speed of at least 20 miles per hour. My power output when using the throttle is greater than it would be if I were pedaling, according to the readout. If I had much further to go, it would be a much less effective mode of transportation. But as I already mentioned, I rode for more than a week without the battery showing any signs of wear, and that included climbing some really challenging 15 percent grade hills near my house. Even when the speed decreased to 7 mph on the ascent, the Heybike Sola always reached the summit.

It’s important to note that this bike will feel very different if you’re a much bigger person. Here, physics and a little bit of taste are at play. When you weigh 165 pounds instead of 115 pounds or if you have some expertise with dirt motorcycles instead of just riding a 150 Craigslist Marin to the coffee shop, it feels very different to sit down and gun a strong 48-pound bike with a throttle. Among others, my own 5’11” 165-pound husband favors large bikes with a throttle like this one.

I can therefore appreciate the Heybike Sola’s numerous practical features. I would not suggest this type of bike to someone smaller or lighter, and I would not let my child ride it, especially if they were under 5’5″ or 120 pounds, considering the abundance of lighter, more comfortable, and similarly priced bikes.

Heybike Sola: Conclusions

There isn’t a perfect electric bike for everyone, so trying to find it is a bit of a fool’s errand. But for particular riders, a select few will do better than the majority. The Heybike Sola aims to appeal to commuters and leisure riders by combining a design and characteristics that are suitable for both. It does this by straddling two distinct classifications.

While it features a fair range and an unthreatening design that will particularly appeal to those searching for their first e-bike, it offers a lockable battery and adjustability for commuters and a reasonable range and reasonable design for leisure riders.

Yet for 1099, it doesn’t seem like a great deal given the limited warranty, weight, simple control panel, and dearth of truly unique features. Yes, the cost of electric bikes has recently increased, but there are many less expensive options with identical specifications, such as the Crossfire E from Carrera.

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HeyBike Cityrun Electric Cruiser Bike


Beautiful Cruiser eBike

This bike was stunningly beautiful with some unusual attention to detail. It really was in-person and my neighbor commented about its orange color the moment he saw it out for its first test ride.

My parents retired a year ago after decades of working 14 hour shifts at their donut shop every… single… day of the year. It was time for them to enjoy their lives and to further bond with the grandchildren they love. My 5’1″ mom had enjoyed the Jasion EB7 Foldable eBike for some time until one day she fell and injured her face and knee. It shook her to the core and wanted to get a tricycle instead, but I asked that she try one more bike before we gave up on a two-wheeler. She had agreed.

Nearly the same criteria I had wanted for her remained:

Metakoo Cybertrack 100 vs Googo SY26 (with accessories)

  • Decent motor to aid with steep inclines
  • 7 or 21 speeds/gears for tackling difficult, uphill climbs
  • Pedal Assist System (PAS)
  • Easy to get on/off for a woman in her 60s
  • Comfortable ride with shock suspension
  • Low height
  • Initially, fat tires for more balance and control, but the weight was too much for her. I now wanted regular tires for her
  • Optionally, a large, detachable battery for long rides and convenient charging

Several bikes I had tested were made for riders who were at least 5’3″ tall, had lousy battery life, or had small diameter wheels that would make rides less comfortable for an older woman. The Jasion EB7 Foldable Electric Bike checked every box I was looking for, EXCEPT at a minimum height of 5’2″, it was still an inch too tall for her. Yes, an inch apparently made a difference for my mom as she could not get off safely without injury.

This time I wanted her to try the HeyBike Cityrun cruiser electric bike. It had normal tires, seemed to have a lower seat height requirement, and looked very comfortable to ride on — except, I made a mistake: it actually required the rider to be at least 5’5″ tall. So, it was not suitable for my mom and had to be returned (sorry, HeyBike!), but I wanted to write a review for it anyway because it was such a darn good eBike.

Why An eBike?

Electric bicycles have enabled our family to travel longer distances and visit more places even though many riders still shun them. They feel that motor assistance is cheating, and I agree! Biking is as much a sport as it is recreational: on one hand, there are those who want to challenge their physical abilities, and on the other, it is a more leisurely way to explore and bond with family and friends. Two children have steered the competitive me towards the latter as seeing the joy on their faces has even trumped the thrill I used to seek on the mountain trails. Towing them in our Burley D’Lite 2-Seat Trailer (with 45-100 lbs extra) was no joke: cramping up during a trip made for a PAINFUL ride home! That was when I really started to appreciate electric bikes — the motorized assistance on the uphill climbs and during the final return miles with tired legs had been a welcome blessing!

Googo SY26 with Burley D’Lite (25 Mi)

Bike or Scooter?

Electric scooters are more nimble to move around with — and in some cases, more fun — but local laws may prevent them from going onto the same paths as electric bicycles. Most can also be carried around more easily due to their more compact size and lighter weight. Personally, I prefer bikes because they are safer to operate, can (usually) go onto the same places that mechanical bicycles can operate, are (generally) allowed to carry an additional passenger, and if the battery runs out or fails, you can still pedal around. A scooter would stop functioning without a battery.


HeyBike Cityrun Cruiser eBike

The HeyBike Cityrun 26″ Electric Bike with Shimano 7 gears was a stunningly beautiful bike. It was packaged well and the attention to detail by the manufacturer was immediately noticeable through a unique set of features, a well-written manual, and on-frame labeling. There were some minor gripes, but I will get to them later. The orange color stood out, was unexpectedly pleasant to look at, and the bicycle was VERY fun to ride! Whichever team designed it, made the color choices, and selected the handle and seat material and color scheme should pat themselves on their backs for an artistic job well-done. It truly wowed me after having reviewed SO MANY electric bikes. Let’s get right into it:


Ride performance, like many electrical bikes, was clean, smooth, and comfortable thanks to its front suspension to smooth out bumps. Shock absorption level could be adjusted for increased pedaling efficiency. The motor’s 500W of (nominal) power was strong, holding a 43% advantage over both my dad’s Metakoo Cybertrack 100 and my Googo SY26 mountain eBikes. That meant a very sudden, Rapid speed increase that could feel out of control at times, but my mom had previously handled the similarly powered Jasion EB7 like a Champion after a few minutes of riding. So, I expect any rider to be able to adjust to it as well. 500W felt much zippier and smoother than my Googo’s 350W motor and handled hills with less effort. Shifting between gears — both mechanically and between the Power Assist Levels (PAS) — was smooth and effortless but hang on to your seat when set to PAS 5 as the speed picked up VERY fast to 20 mph!

As I had stated, shifting between the 7 gears was effortless with a thumb and finger control mechanism, and even though the tires were not the fat kind, they still gave a very satisfying sound while zipping around the neighborhood park and up a few climbs. Power Assist (PAS) was available in 5 levels, and speed topped at 22 mph without a rider. Legally, electric bikes cannot go faster than 20 mph to fall under the United States Class 2 designation, and in California, only Class 2 can ride on Class 1 bike paths. What does that mean? This bicycle’s motor was just fast enough to fall within the California speed limit. Either way, be sure to check with your local and State laws before you push the HeyBike to its top speed.

Electronic controls found on the left side of the handlebar were easy to use and managed the headlight, horn, turn signal, PAS level, power, and monochrome display. The screen was easily readable under direct sunlight and provided a nice set of information, including battery and Power Assist levels, speed in mph, trip time and odometer, and more. I loved the animation when switching between the various data views — small touches like that could evoke a small amount of joy from the rider. I

Programming options were available on the screen to control various settings — See PROGRAMMING section for more details. The display itself gave a brief summary of what each configuration was for — very nice touch!

Dual, hydraulic disc brakes allowed for faster, more controlled stopping.

The large 720Wh-capacity, Li-Ion battery (15Ah @ 48V) gave the HeyBike a VERY significant advantage over any of the bikes I had previously tested, including my Googo’s 360Wh. Battery could be fast-charged (at 218.4W, 54.6V @ 4A) — I appreciated this a LOT as most eBikes took 6 hours to fully charge (HeyBike’s required about 3-4 hours). Longer runtimes with a more powerful motor, although also with quite a bit of weight at 61.7 lbs: 35-55 miles on fully-electric and 45-70 miles with pedal assist. My experience found that it should theoretically be able to handle at least 140 miles with PAS only used for short uphill climbs. I prefer pedaling most of the time for exercise/health purposes and only invoke the motor just enough to get up a hill. This can be done by twisting the throttle found on the right side of the handlebar: the more you turn it, the more power is invoked on-demand. That leads me to some of the things I did not like about this bicycle.

Battery Lock and Charging Port

Unlike the Metakoo Cybertrack 100, every bike I had tested could not activate the throttle while PAS was turned off or set to level 0, the HeyBike included. This perhaps is a safety feature to prevent accidental acceleration when power assist was disabled, but I really enjoyed Metakoo’s implementation because it allowed me to always pedal unassisted and ONLY power on the motor when I turned the throttle. The HeyBike (and all other bikes) required changing the PAS to level 1 before the throttle could temporarily be activated. One would then have to change PAS back to 0 for non-motorized operation. It is a very minor gripe that I got over very easily with my Googo, and it perhaps is best for the rider’s safety to NOT allow on-demand assist with PAS off.

There were four (4) power modes:

  • Fully electric: No pedaling necessary
  • PAS – Pedal Assist System: Get assistance while pedaling
  • Motor off: Move bike with the power of your own legs 😉
  • On demand: Turn handlebar thumb throttle to manually increase speed and motor assist level

The battery was made of Lithium-ion Nickel Manganese Cobalt (NMC) chemistry. What that means is a 20-25% capacity loss after every 500 charge cycle, resulting in about 6-10 years with up to 2,000 cycles before the battery would become useless.

HeyBike Cityrun’s 62 lbs made it one of the heavier eBikes (Polarna M4 was 68 lbs) due to a larger battery and strong motor.

When the battery was out, the higher number of gears would allow easier, more effective, manual pedaling than eBikes without any gears.

Two keys were included and required to operate the bike. So, do NOT lose them! I was, however, very pleased to see that unlike the Jasion, this HeyBike did not make the rider keep the key locked in the ignition underneath the down tube for which one had to crouch down for. Instead, the key was only needed to lock/unlock the battery to/from its frame for off-bike charging. THANK YOU, HeyBike, for making life easier for the rider! When the battery was locked in within the thick down tube, the display showed “Off” when there was no power.

The HeyBike had an exceptionally clean, streamlined look with cables tucked away nicely.

Attention To Detail

This part brought me the most joy. Rather than seeing much of the same old eBikes, the Cityrun had some nifty features and choices made behind its design.

  • The bright headlight and large taillight both turned on automatically (when LCD was powered on) once it was dark, but could also be manually turned on/off when the LCD was shut off
  • Both the front headlight and rear taillight housed yellow turn signals activated by a switch on the left handle — NICE!
  • A cup holder was attached to the seat tube (oddly, a rarity with eBikes)
  • Reflective material along the circumference of the tires for greater visibility when crossing intersections
  • Leather-like, stitched look on the handles and seat

Details: Crank arm, Leather-like accents, Bottle cage

  • Informative LCD with some animations
  • Programming options were nicely summarized for each configuration item (a rarity among all bikes I had previously reviewed)
  • Adjustable handlebar stem for a more comfortable riding height
  • Bolt cover for weather proofing


Where HeyBike paid a lot of attention to the overall design of the bike, assembly required a bit more effort than I would have liked. Mind you, an experienced installer would have no trouble putting all parts together, but I had perhaps been spoiled by the likes of Jasion and Polarna M4 where their bikes were nearly ready to ride out-of-the-box. Not this Cityrun.

First, one had to install the adjustable handlebar stem. I had later discovered that a plastic, round piece right above the fork was sticking out a bit and required me to uninstall the stem to adjust that particular piece. Somebody at the factory did not pay attention during assembly. Then the handlebar, headlight, and front fender had to be installed (that is normal for every eBike I had tested). Next, I inserted the quick-release skewer through the front wheel and tried to install it to the fork — could not do that until I found a protective, plastic piece between the disc brake that had to be removed. Finally, connected the electronic cables for the headlight, LCD, and taillight, and installed the seat post and pedals. Voila! Good to go! I was happy to see that the disc brakes did not require any tuning, but the tires had no recommended pressure ratings printed onto them. The manual did state to pump between 35-60 PSI.

heybike, mars, review, affordable, fat-tire, e-bike

Attachments: Cargo rack, Front fender, Headlight

One concern I had about the otherwise excellent quality of the HeyBike were the fenders. They were made of a shiny, thin material that could easily break AND were held to the frame by screws. That posed a particularly difficult situation for the rear one: it would be nearly impossible to replace the fender because it would be very tight for a screwdriver to reach. It would likely require a specialized, angled screwdriver or a flat-out removal of the rear tire before the fender could be worked on. So, pray that the rear fender never breaks. HeyBike could perhaps have used a more durable material and easier-to-reach mounting mechanism, but that would likely take away from the premium look the Cityrun commanded.

Serial number was etched onto the bottom front of the stem. Be sure to register it with law enforcement in the event of a recovery.

HeyBike included a fast-charging, 218.4W AC brick to charge the battery within about 3-4 hours. The battery could be left charging within the down tube or removed for energizing by your desk.

heybike, mars, review, affordable, fat-tire, e-bike

Final Thoughts

HeyBike Cityrun Cruiser eBike

Overall, I was very pleased and quite surprised by the design, color scheme, and performance of the HeyBike Cityrun cruiser electric bike. It was a shame that it was too tall for my mom as I really wanted her to ride it, but alas, the search for a more suitable bike continues. I may throw the towel and finally get her an electric trike (tricycle).

Either way, the HeyBike Cityrun comes highly recommended as a great-looking, very functional eBike where the manufacturer had put in a lot of attention to detail.

Read on for tips or check out the Cityrun’s current price on Amazon.


  • Covered charging port is on the side of the down tube
  • AC charging brick LED: Red = Charging. Green = Full
  • Lithium-Ion batteries are known to be volatile and could catch on fire
  • Do not charge overnight or unsupervised for prolonged periods of time. Stop charging once full
  • Do not leave the bike in full sun or below freezing
  • Lithium-Ion batteries lose about 20-25% of capacity after every 500 charging cycle
  • Ensure seat post is locked and tight


  • Set Pedal Assist to level 1 or higher by pressing “” button. Motor kicks in as you pedal
  • Throttle the thumb accelerator by the left-side handle, and the motor will fully take over (Power on demand)
  • The more you push, the faster the bike will go
  • Helps with walking the bike uphill at 3.7 mph (6 km/h)
  • Be aware of unexpected obstacles. I tumbled once while mountain biking and was hurt quite badly. It was not fun

Aircraft Transport

Most, if not all, airlines prohibit electronic scooters and bikes that do not meet specific criteria. United Airlines, for example, allows collapsible ones whose battery is both removable and below 300 Wh. Southwest Airlines is more restrictive at 160 Wh. This bike’s battery is 672 Wh. Lithium-ion batteries are known to be volatile, and the higher their capacity, the more risky they are. Check with the airlines, TSA, and FAA for more details.

Bike Assembly

Here are some installation tips for those assembling their first bicycle. There is a diagram below to identify the major bike parts.

Bike Repair Stands

I use a repair stand to help with assembly and maintenance. SereneLife SLBKRS3 has a maximum load capacity of 66.7 lbs — enough to carry most electric bikes without falling over.

SereneLife Bike Repair Stand, Metakoo Cybertrack 100 mountain eBike

For easier maintenance or assembly, a bike repair stand can save a lot of time and back pain. Be sure to get one that can hold up your bicycle’s weight.

Bike Parts

Bicycle Parts /Al2 (CC by 3.0, Wikimedia CurID 2995998)


To enter programming mode: Press and hold both the “” and “-” buttons until “U03” shows on the LCD. Cycle through the options with the “M” button, change values with “” or “-“, and save the changed setting(s) by leaving the screen for a few seconds or long-pressing “” and “-“.

Program Options

PROGRAM AT YOUR OWN RISK! Improper use may void warranty and/or cause bike to fail or be damaged.

Note: I did not take an extensive look at the different settings and what ranges or options were available for each since I had no intent of keeping the bicycle.

User Settings

Advanced Settings

  • P01: Backlight brightness level. Default: L-3
  • P02: Unit display. 0 = kilometers (km/h), 1 = miles (mph). Default: 1
  • P03:Do not modify. Battery Voltage. Default: 48
  • P04: Automatic Sleep. Default: 0
  • P05: PAS levels. Default: 0-5
  • P06:Do not modify. Wheel Diameter. Default: 27 (inches?)
  • P07:Do not modify. Number of magnets for measuring speed. Default: 1
  • P08: Maximum speed. 0-63. 63 = No limit. Default: 20 (mph?)
  • Changing limit to 63 will allow the motor to run at its full capacity. I was only able to get it to 21.5 mph (with no rider)
  • Can result in overheating and cut motor’s life short. Going over 20 mph may be illegal in your State or country
  • P09: Non-0 Start. Default: 0
  • Whether the motor can start when bike is not in motion. Should be left off to prevent bike from accidentally moving during transport
  • Ensure this is set to what the controller and hub motor can handle
heybike, mars, review, affordable, fat-tire, e-bike

Error Codes

I did not take an extensive look at the different error codes and possible fixes. However, if I remember correctly, they were listed in the manual.

Motor Bike Laws

I first learned about laws governing motorized scooters when reviewing the Joyor X5S, and unfortunately, they were (and still are) not straight-forward. There had been a number of accidents involving scooters hitting pedestrians or riders hurting themselves. I get it. Laws are there to protect people from each other and themselves, especially from irresponsible individuals.

Electric bikes can result in severe injuries or death with their high speeds.

Surprisingly, the laws governing electric BIKES are much more lax. They are similar to non-motorized bikes, in fact! There are different classes of eBikes. This HeyBike falls under the lower-speed Class 2 with a maximum of up to 20 mph, and as such, can be used on Class 1 bike paths in California. All 3 classes can ride on the protected, one-way Class 2 bike lanes found on streets and highways. Be sure to check with your local regulations. Some States categorize eBikes as mopeds or motor vehicles.

  • Class 1: PAS-only with no throttle. Max assisted speed: 20 mph
  • Class 2: PAS and throttle. Max assisted speed: 20 mph
  • Class 3: PAS-only with no throttle. Max assisted speed: 28 mph

California Law

Disclaimer: I AM NOT A LAWYER. Please consult your local city, police department, and/or legal professional for advice.

The following is my interpretation of how I understand the law. It has been shortened to only point out parts that I found interesting or noteworthy.

Mountain biking with Cybertrack 100 /Metakoo

  • Does NOT require riding with a Driver’s License or Instruction Permit (eScooters require them!)
  • No license plate required
  • Passengers are allowed as long as the bike was designed for it
  • Can ride on existing bike infrastructure
  • Speed limited to 20 mph
  • Follow most of the same laws as non-motorized bicycles
  • Helmet required for riders 17 years and younger
  • No minimum age limits


Some accessories I recommend for this bike for added convenience and safety:

  • Molik Bike Handlebar Bag
  • Salzmann 3M Spoke Reflectors: For increased visibility in the dark
  • Bar End Bike Mirrors (like Brisk, Tagvo, or Zacro): To see behind you
  • Rear rack seat cushions
  • Burley Trailer Coupler: So trailer can be switched to another bike (ie. bike failed or ran out of battery)

Where To Buy

  • Molik Bike Handlebar Bag
  • Salzmann 3M Spoke Reflectors
  • Bar End Bike Mirrors: Brisk, Tagvo, Zacro
  • Rear rack seat cushions
  • Additional Trailer Coupler so Burley can be switched to another bike (ie. bike failed or ran out of battery)


  • Polarna M4: 20″ foldable, electric bike with 750W motor, 8 speeds (30mph), and 4″ fat tires
  • Jasion EB7: 20″ foldable, electric, 7-speed bike with fat tires, 500W motor, 20mph max
  • Googo SY26: 26″ electric mountain bike with 21 speeds, large informative LCD, electronic headlight and horn, and solid build
  • Metakoo Cybertrack 100: 26″ electric mountain bike with 21 speeds and a clean look
  • Ancheer AM001907/AN-EB001: 26″ electric mountain bike with 21 speeds, electronic headlight and horn, and powerful, Rapid acceleration
  • Macwheel Ranger 500: Comfortable, 7-speed, electric cruiser for city commutes
  • Gyroor C3: Single speed, electric, semi-foldable, and priced fairly low

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