Review · Heybike
folding8.0/10Heybike Mars 2.0
Reviewed by John Weeks · daily commuter
At a glance
Run this in our range calculator →Verdict in 30 seconds
If you want a folding fat-tire e-bike for around $1,500 and you're shopping Amazon, the Heybike Mars 2.0 is a leading pick. 750W rear hub, 20×4-inch tires that float over sand and gravel, and a fold that fits in any SUV trunk. Heavier than a Lectric XP 4 (77 lb vs 64 lb), but the fat tires are what you...
Pros
- + 750W motor + 86 Nm torque — strong for a sub-$1,000 folder
- + 20×4-inch fat tires — sand, gravel, snow capable
- + Integrated rear brake light + turn signals (rare at this tier)
- + Class 3 (28 mph pedal-assist) — full Class 3 spec at the price
Cons
- - Mechanical disc brakes (not hydraulic) — fade on long descents
- - Cadence sensor (not torque) — power ramps in steps, not smoothly
- - 77 lb is heavy if you need to carry the folded bike up stairs
- - No rear-rack passenger rating — cargo only
Who is this for?
- RV / camper-van riders — fat tires for beach + backroads
- Mixed-terrain commuters (paved + gravel + dirt path)
- Apartment dwellers in cities with rough road surfaces
- Budget-conscious buyers who specifically want fat tires
What stands out about this bike
Most sub-$1,500 folding fat-tire e-bikes feel like a parts catalog stitched together — Mars 2.0 is the rare one that feels like a designed product. The frame welds are clean, the 5-inch coloured display is genuinely useful (not a 90s LCD), and the integrated tail-light + brake light is the kind of detail you usually don't see until $1,500+.
Power and battery
750W rear hub is generous for the price tier — equivalent torque to bikes that cost $200 more. The 624 Wh battery (48V × 13Ah) sits inside the seat tube, so there's no awkward external pack. Heybike claims up to 70 mi range; owner reports cluster at 28-35 mi at PAS 3 with occasional throttle, so a 50-mile realistic estimate is what we plan around. Cold weather under 40°F drops another 15%. With Class 3 unlocked the throttle tops out near 20 mph and pedal-assist reaches 28 mph — verify your state allows Class 3 before relying on the top speed.
Folding and transport
Folded size (37.4" × 21.7" × 28") is comparable to the Lectric XP 4 but the bike is 13 lb heavier (77 lb total). It fits in a sedan trunk if you lay it down and use a folding-bike bag (the seats around it can stay clean). Where this bike actually wins: RV exterior racks, where the fat tires double as cushion against road vibration.
Build quality and what gives
Mechanical disc brakes (not hydraulic) — the most common Heybike compromise at this tier. They work fine for normal riding but fade on long hilly descents. Pedal assist is cadence-sensor (not torque), so power ramps in steps rather than smoothly with effort — noticeable on smooth roads, less obvious on the rough terrain these tires were built for. The IP54 rating means light rain is fine; don't pressure-wash it.
Who should buy it (and who should skip)
Buy this if you want fat tires + folding + Class 3 pedal-assist for around $1,500. Skip this if you mostly ride pavement and prefer a smoother torque-sensor pedal feel — the Lectric XP 4 ($999) is the better road-commuter at a lower price. Skip this if you need a real cargo bike — Mars 2.0 has a rear rack but it's not Tern-GSD-rated for passengers.
Ready to buy?
See current pricing on Amazon
We update prices as the listing changes — final price is set by the retailer at checkout.
Frequently asked questions
Is the Heybike Mars 2.0 actually Class 3 (28 mph)?
Yes, but it ships configured for Class 2 (20 mph throttle / 20 mph pedal assist) by default. You unlock Class 3 (28 mph) by toggling the bike-class setting in the display sub-menu. Note: many US states restrict Class 3 throttle on multi-use paths and bike lanes — check your state DOT before riding above 20 mph in those zones.
How does the Mars 2.0 compare to the Lectric XP 4?
Different bikes for different riders. Lectric XP 4 ($999): hydraulic brakes, torque sensor, 64 lb, smoother power delivery, road-focused. Heybike Mars 2.0 ($1,499): fat tires, mechanical brakes, cadence sensor, 77 lb, sand/snow capable. If you mostly ride pavement, XP 4. If you want to ride the beach or fire roads, Mars 2.0.
Can the Mars 2.0 carry a passenger?
No — the rear rack is rated for cargo only (not passengers), and the 330 lb total payload limit assumes one rider plus gear. For two-up capability you need a long-tail cargo bike (Lectric XPedition, Tern GSD, Yuba Spicy Curry).
Is the battery removable for charging indoors?
Yes — the battery slides out of the seat tube via a key lock, weighs about 8 lb, and charges separately from the bike. This is the right setup for apartment dwellers who can't run a charger to outdoor parking. Charging time is about 6 hours from empty.
Does the Mars 2.0 work with the Heybike app?
Yes — Bluetooth pairing with the Heybike app lets you adjust assist levels, view battery diagnostics, and (depending on firmware) toggle Class 2/3 mode without diving into the display menu. The app is functional but not essential; you can run the bike entirely from the bar-mounted display.
How long is the warranty?
2 years on the frame, motor, and battery from Heybike when purchased through Amazon or heybike.com. Wear items (tires, brakes, chain, drivetrain) are 6 months. Make sure to register the serial number on heybike.com within 30 days of purchase to activate the full coverage.
Bottom line
Is the Heybike Mars 2.0 for you?
Check the live price + availability before deciding.