Heybike Mars 2.0

750W rear hub is generous for the price tier, with 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, so verify your state allows Class 3 before relying on the top speed.

Folded size (38.6" × 17.7" × 29.9") is comparable to the Lectric XP 4 but the bike is 11 lb heavier (75 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.

The brakes are where the current Mars 2.0 differs from the first one: the listing we link specifies 180 mm dual hydraulic disc brakes with 1.8 mm rotors, where the original SKU used mechanical discs that faded on long descents. On a 75 lb bike with a 32 mph mode, that upgrade matters more than any other line on the sheet. 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 battery carries an IP65 rating, so rain is fine; don't pressure-wash the bike.

Buy this if you want fat tires + folding + Class 3 pedal-assist for $1,199 (as of Oct 30, 8:10 PM EDT, subject to change). Skip this if you mostly ride pavement and prefer a smoother torque-sensor pedal feel, since the Lectric XP 4 is the better road-commuter at about the same money. 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.