Windhorse W4B
All-terrain folding fat-tire e-bike · dual suspension · Shimano 7-speed

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...

$499.00 USD$699.00 Save $200.00
Color — White

Popular Upgrades

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Free shippingOn orders over $99
1-year warrantyFrame, motor & battery
UL-certifiedTested safe battery
30-day returnsRide it risk-free
720W · 68 Nm
Motor
20 MPH
Top speed
70 Miles
Per charge
48V/15.6Ah
Battery
20 inch
Wheels
Carbon Alloy Steel
Frame
The all-terrain folding e-bike

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.

Go-anywhere and foldable — just $499, built for every ride.
720W · 980W peakUp to 70 miShimano 7-speed20"×3" fat tiresDual suspensionFolds flat
Why it just works

Designed around how people actually ride.

Step-through, easy on & off

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

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

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

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.

How it rides
01/02
  1. 01

    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.

  2. 02

    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.

Battery & security

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.

48V / 15.6AhRemovable + lock70 mi rangeAnti-theft
Real-world range

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.

Throttle45 mi
+ Pedal-assist70 mi
Add pedal power and the Shimano gears, and the W4B stretches from 45 to 70 miles per charge.
Quality in the details

Built well, down to the last part.

Carbon-alloy steel frame + Built tough

Carbon-alloy steel frame

A carbon-alloy steel frame carries 330 lb and stays rock-solid on rough off-road ground.

Front & rear disc brakes + Control

Front & rear disc brakes

Dual disc brakes give controlled, all-weather stopping on off-road descents and steep grades.

20" all-terrain tires + All-terrain

20" all-terrain tires

Aggressive 20-inch all-terrain tires grip pavement, gravel, dirt and mud alike.

LED display & lights + Visibility

LED display & lights

A clear LED display keeps status in view, and integrated lights handle night rides and remote trails.

Built for real life

One bike. Every kind of ride.

Ride anywhere the road ends
Off-road

Ride anywhere the road ends

Pack gear, go off-grid
Camp

Pack gear, go off-grid

The perfect RV runabout
RV

The perfect RV runabout

Folds into the trunk or RV
Fold & go

Folds into the trunk or RV

Windhorse W4B size and fit
Size & Fit

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.

Rider height
5'1" – 6'3"
Frame
Carbon Alloy Steel
Bike weight
66.1 lb
Max payload
330 lb
Why the W4B wins

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.

Feature
Windhorse W4B$499
All-terrain folder$1,000 – $1,600
Range
70 mi
45–60 mi
Suspension
Front & rear
Front only
Gearing
Shimano 7-speed
1–7 speed
Tires
20"×3" fat
20"
Rear rack
55 lb rated
Varies
Folds
Yes
Rarely
Owner rating
4.61★ · 612
Varies
Comparison based on common $1,000–1,600 all-terrain folding e-bikes. Specs as published by each brand.
Full specifications

Every number that matters.

Motor & Performance

Motor720W
Top speed20 MPH
Torque68 Nm

Battery & Range

Battery48V/15.6Ah
Range70 Miles

Drivetrain & Build

Wheels20 inch
DisplayLED
Front suspensionYes
Rear suspensionYes
FoldableYes

Frame & Dimensions

FrameCarbon Alloy Steel
Weight66.1 lb
Max payload330 lb
Rider height5'1" – 6'3"
Dimensions54.61"L × 9.06"W × 27.24"H
What's in the box

Unbox. Unfold. Ride.

Windhorse W4B e-bike85% pre-assembled
Removable batteryPlus anti-theft keys
Smart chargerFast & efficient
Pedals & hardwarePre-sorted & labeled
ToolkitFor final setup
Manual & warrantyQuick-start guide included
  • 5 stars: 537 (72%)
  • 4 stars: 210 (28%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 1 (0%)
Some of the reviews shown are from related products the merchant grouped with this one.
A
Anonymous
It works great overall

It works great overall. The only downside is that the seat is a little hard and could use some extra cushioning for better comfort but everything works.

P
Peter Filippi
I bought the model F2

I bought the model F2. It even has an assembly video. Only had to connect the front wheel and handle bar and a few easy items. The ride was great and with the battery out it’s easy to put on the truck. Love my WindHorse F2

D
Damian
Why should you buy the windhorse w2a e-bike?

I am absolutely loving my windhorse w2a e-bike. The ride is super smooth, the power is fantastic for daily commuting, and the build quality feels very sturdy and reliable.

Above all, I want to give a huge shoutout to the customer support team, especially Mariel.They were incredibly patient, professional, and quick to respond when I had a few questions. Their top-notch assistance made this whole experience amazing.Highly recommend both the e-bike and the wonderful support team.

A
Anonymous
Customer service at wind horse factory is like

Customer service at Windhorse factory is like no other. If I could give them 10 stars, I would. I needed a small part replaced, and they stuck with me through the whole process. They are easily available by email and text and not only that, they will talk to you in the middle of the night. I got my exact part and it fits perfectly. Thank you Windhorse Factory!

C
Chris
Okay so here is my review of the W4A folding ebike

Okay so here is my review of the W4A folding ebike. I am a daily bicycle commuter, 10 miles average every day. I will say that the bike feels solid, well built frame, with nice solid welds. The cable routing looks nice and clean, at least as clean as it can for exterior routed cables. Everything works as it should except for a few very minor problems, but any new bike is going to have these issues no matter how much you pay, andIthink for this price Wind Horse did a fine job. With that said, do plan on tinkering with the rear derailleur and disk brakes. Brand new steel cables do stretch, so this is a necessary maintenance routine, if you don't know how to adjust these, you need to learn or pay a bike shop. Only other negative is that I don't feel the battery lasts as long as it should.I'm only getting about ten miles on throttle only, and this is on flat ground. Everything else, A+. Plenty of torque and speed. I get back and forth comfortably. It is a very good entry level ebike. Just wish the battery lasted longer.

X
Xncrman
My honest review

My honest review of the Windhorse F2 eBike. At age 68 my wife and I were looking for ways to be outdoors and more active. We talked about ebike for a couple years and was recently were able to test ride a neighbors ebike. First we decided what our needs were. 1. leg through access 2. no fat tire 3. not super heavy 4. standard 26” wheel ebike (we’re old school) 5. good reviews 6. priced so if stolen we wouldn’t loose financially. Windhorse F2 eBike met all these criteria and we liked the grey color. For the Windhorse F2 we give it 5 Stars.

The bikes came packaged very nicely and we received our two bikes in 7 days. Assembly was easy and took about an hour from taking out of box to putting air in the tires. First battery charge took a few hours and we were off riding. It does take a couple short rides to educate yourself with the new experience of an eBike and I suggest first to ride the eBike in “0” mode no pedal assist to get the feel of the ebikes weight and handling characteristics. Then start with mode “1”. It won’t take long with these Windhorse F2 ebikes and you will be out enjoying the ride.

I also want to thank Windhorse customer service as I have emailed several times with questions and received very quick responses from Kaye at Windhorse. Very helpful and courteous. So for customer service 5 Stars

You will see in my photos that I added a couple features to my bike a pair of vintage Honda motorcycle saddle bags from the 1970’s and rear camera display for ebikes from Amazon. And don’t forget your helmets.

I would like to come back in 3 months and add a follow up review after a summer of riding.

Ride safe!
John & Debbie Montani

A
Anonymous
Got this for my daughter to ride to work and back and its beengreat

Got this for my daughter to ride to work and back and its beengreat , she loves it. It was easy to finish the assembly and has great battery life. I would definitely buy this again

L
Lucas Gonzalez
Our son loved it!

The bike is packaged well and very easy to assemble. In fact, assembly is only a couple of steps. It has good speed and the battery life has been great. Takes about 4-5 hours to charge fully. Definitely worth purchasing and the kids loves it!

G
George Harris
Good service and awesome Ride

I have the electric bike ride well good cruise control and smooth ride and proper control with steering.

A
Alishia Wheeler
It’s almost a 5 star

I would give it a 5 start rating, however one thing is the rear basket is small I mean only a gallon jug will fit in it so it’s not super practical, personally I would prefer a rear rack option but that’s just me and what would work better for my situation. Also it doesn’t go through puddles very stably. I did wreck while door dashing after going through a small puddle. I’m not sure if it was my error or the bike but it slid in the bike lane causing me to wreck. other than that it has been a great bike and it’s super convenient to commute in town, and it’s light weight so I can lift it over curbs and bring it inside to store it. It’s also been therapeutic to ride around and see the beauty of my town.

J
John Smith
Title of the review

Body of the review

J
John Smith
Title of the review

Body of the review

R
Ronny

Very well recommended☺️

S
Scott Gielow
So far its a great little bike

So far its a great little bike. Will be using it at camp grounds

A
Amara Ekstrom
Headlight beam pattern is wide, good for unlit trailheads

Ride to trailheads before sunrise sometimes and the spread of light is wide enough that I'm not missing things off to the side.

S
Sofia Kowalski
Worth the jump up from the standard V8 for my longer rides

Compared it against the base model in store and the extra range genuinely matters once you're doing 20+ mile loops regularly.

K
Kenji Ferreira
Climbs my street's steepest section without downshifting to lowest gear

Compared to my old analog bike where I'd have to grind up in first gear, this handles it in a middle gear with assist.

K
Kavya Okafor
Brakes bite hard right out of the box, no bedding-in weirdness

Was ready for the usual squishy first-week brake feel but they were confident and progressive from the very first ride.

J
James Mensah
Battery pull-tab makes overnight indoor charging simple

I bring just the battery inside instead of the whole bike and it's a genuinely easy routine now that I'm used to it.

H
Hana Beaumont
Torque feels stronger than the wattage number suggests

Expected modest hill performance given the motor spec but it pulls harder than I anticipated on my neighborhood's steeper streets.

Y
Yusuf Delgado
Suspension soaked up a rutted fire road better than I expected

Took a rougher trail than usual on a whim and the front end handled the washboard sections without beating up my hands.

S
Sofia Duarte
Fenders keep road spray off my back way better than my old bike

Ride through a lot of puddly streets after storms and I no longer show up with a wet stripe up my back.

L
Lucas Delgado
Feels planted going downhill, no speed wobble

Live near a fairly steep descent and was nervous the first time, but it stays composed well past what I'd consider a nervous speed on my old bike.

K
Kenji Nakashima
Derailleur needed a small barrel adjustment after the first week

Pretty normal for cable stretch on a new bike, took five minutes to dial in myself once I found a video showing how.

R
Rosa Ekstrom
Comfortable enough for my 45-minute one-way commute

Was worried about the saddle on longer rides but I don't get sore even after the full trip each way.

L
Lucas Nakashima
Dual keys are a nice touch for two-person households

My wife and I each keep our own key so neither of us has to hunt for the spare before heading out.

T
Theo Castellano
Assist reset display glitch happened once after a firmware update

Screen froze on one assist level for a ride, support walked me through a quick reset over chat that fixed it in minutes.

Good to know

Questions, answered.

Still have questions? Contact us →

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.