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720W motor, 980W peak
A 720W motor peaking at 980W hauls a full load up off-road climbs and steep grades — power to spare on gravel, dirt and hills.
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Suspension for rough ground
Front suspension soaks up curbs, gravel and broken trail so ruts and bumps never reach you — steady and composed on any surface.

Windhorse W4B
Engineered with a 720W (983W peak) brushless motor for 20 MPH speed. The removable 48V 748.8Wh li-ion battery delivers up to 55-70 miles...
Popular Upgrades
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One bike. Every road. Fat tires. Dual suspension. Goes anywhere.
A folding fat-tire e-bike with dual suspension, Shimano gears and 70-mile range — at home on road, gravel or trail.
Designed around how people actually ride.

Step-through, easy on & off
A low step-through frame lets anyone swing a leg over and go — easy to mount even loaded with gear, for riders young and old.

Folds to fit anywhere
Fold the frame and handlebar in seconds to stash the W4B in a trunk, an RV bay or a closet — then unfold and ride.

Shimano 7-speed gears
Seven gears make climbs easier and long, flat stretches faster — so distance rides and loaded hauls stay comfortable.

Heavy-duty rear rack
The high-capacity rear rack takes panniers, a cooler or camping gear — add your own baskets for camp trips and hauls.
Big battery.
Anti-theft.
A 48V/15.6Ah removable battery goes up to 70 miles and lifts out with an anti-theft lock — charge it anywhere, secure it everywhere.
Go the distance — up to 0 miles per charge.
One of the longest ranges we make, with five riding modes. Ride throttle, or add pedal-assist and gears to go all day.
Built well, down to the last part.
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Built toughCarbon-alloy steel frame
A carbon-alloy steel frame carries 330 lb and stays rock-solid on rough off-road ground.
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ControlFront & rear disc brakes
Dual disc brakes give controlled, all-weather stopping on off-road descents and steep grades.
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All-terrain20" all-terrain tires
Aggressive 20-inch all-terrain tires grip pavement, gravel, dirt and mud alike.
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VisibilityLED display & lights
A clear LED display keeps status in view, and integrated lights handle night rides and remote trails.
Carbon-alloy steel frame
330 lb, off-road rated
The carbon-alloy steel frame is built to take a beating — 330 lb of payload and the twist and shock of trails, gravel and drops without flexing or fatiguing.
Front & rear disc brakes
Stops loaded, on any surface
Front and rear disc brakes deliver strong, predictable stopping in rain, mud and on loose descents — control you can trust when the bike is loaded and moving fast off-road.
20" all-terrain tires
Grip on any ground
The 20-inch all-terrain tires bite into gravel, dirt and mud and roll smooth on pavement — knobby tread and volume that float over rough ground where narrow tires wash out.
LED display & lights
Seen and informed
The LED display keeps speed, battery and mode in clear view, while the integrated headlight and tail light light your way on night rides and dark, remote trails.
One bike. Every kind of ride.
Ride anywhere the road ends
Pack gear, go off-grid
The perfect RV runabout
Folds into the trunk or RV

Comfort on any surface.
Front and rear suspension and 20"×3" fat tires soak up rough ground, while a sturdy frame carries a 55-lb rear rack — and still folds for storage.
All-terrain. Folds flat.
A dual-suspension, Shimano-geared fat-tire bike with 70-mile range and a 55-lb rack — that still folds for storage.
Every number that matters.
Motor & Performance
Battery & Range
Drivetrain & Build
Frame & Dimensions
Unbox. Unfold. Ride.
The W4B adds rear suspension for a smoother all-terrain ride and grippier fat tires, where the W4A is a lighter front-suspension commuter. Both fold and share the 70-mile range and Shimano gears.
Around 45 miles on throttle and up to 70 with pedal-assist and the Shimano gears, depending on rider weight, terrain, assist level and tire pressure.
Yes. 20"×3" fat tires, front and rear suspension and five riding modes handle gravel, dirt and trail as easily as pavement.
Yes. Despite the fat tires and long range, the W4B folds at the frame and handlebar to fit a car trunk, closet or entryway.
Every W4B comes with a 1-year warranty on frame, motor and battery, plus a 30-day return window so you can ride it risk-free.

















