Heybike Mars 2.0
Heybike
If you want a folding fat-tire e-bike for under $1,000 and you're shopping Amazon, the Heybike Mars 2.0 is the answer most buyers land on. 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...
Key specs
- Motor Watts
- 750
- Motor Type
- hub
- Motor Torque Nm
- 86
- Battery Wh
- 692
- Range Miles
- 45
- Top Speed Mph
- 28
- Ebike Class
- 3
- Weight Lbs
- 77
- Payload Lbs
- 330
- Is Folding
- 1
- Folded Dimensions
- 37" × 19" × 30"
- Is Step Through
- 1
- Passenger Capable
- 0
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) throttle — 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
What surprises us about this bike
Most sub-$1,000 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 692 Wh battery (48V × 14.4Ah) sits inside the seat tube, so there's no awkward external pack. Heybike claims 45 mi range, owner reports cluster at 28-35 mi at PAS 3 with occasional throttle. Cold weather under 40°F drops another 15%. Class 3 (28 mph) throttle is on tap — verify your state allows it before relying on the top speed.
Folding and transport
Folded size (37" × 19" × 30") 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 throttle for under $1,000. 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 the same 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.
Best 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
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 ($899): 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.