isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range

isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range

incl. VAT & free delivery
£415.99 £629.00 Save £213.01
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U4 Foldable E-Bike – Power, Range & Convenience!

With a 250W motor (peaks at 500W), the U4 delivers strong performance and tackles inclines up to 20% with ease. Its 375Wh high-capacity battery with smart chip management ensures a safer, longer-lasting ride. Choose from 4 riding modes and cruise at speeds up to 19 mph, with a max range of 88 km. Designed for portability, the lightweight frame, removable battery, and foldable build make it easy to store in your car boot. Commute smarter with the isinwheel U4 – your perfect ride for the city and beyond!

Product
Features
Spec&Size
Reviews
£629.00 £415.99
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
isinwheel U4 Foldable Step-thru Electric Bike 500w 55Miles Range
£629.00 £415.99
24/7 Customer Service
Email: support@isinwheel.co.uk
Tel: +44 1563638328
55 Miles Max Range
250W Motor
375Wh Removable Battery
4 Modes Speed Settings
140–180 cm Rider Height
IPX4 Water Resistance
Why U4

Made for Everyday Ease

A folding step-through electric bike designed around easy storage, easy access and convenient charging.

Fold & Store
Fold & Store

A compact folding design that makes the U4 easier to store at home or fit into a car boot.

Easy Step-Through Frame
Easy Step-Through Frame

The low step-through frame makes getting on and off easier and more comfortable.

Remove & Charge
Remove & Charge

Take the battery indoors for charging without having to move the whole bike.

Rider Fit

Designed to Fit More Riders

With a low step-through frame and adjustable saddle, the U4 is designed for riders approximately 140–180 cm tall.

Rider on U4 electric bike STEP-THROUGH + ADJUSTABLE SEAT
Recommended Rider Height
140–180 cm

A low step-through frame and adjustable saddle help make everyday riding more accessible and comfortable.

29.1–36.2"Adjustable Seat Height
120 kgMax Load
Step-ThroughFrame Design
16 × 2.15"Tyre Size
4 Speed Modes

Choose Your Pace

Four selectable speed settings let you adjust the U4 to suit different riding situations.
6 km/hEasy Control
REMOVABLE BATTERY
Removable Battery
375Wh

36V · 10.4Ah lithium battery

  • ✓4–5 Hours Charging Time
  • ✓Charge Indoors
  • ✓Up to 55 Miles Max Range
Long-Range Electric Bike

Up to 55 Miles on a Charge

Enjoy more time between charges with a removable 375Wh battery and up to 55 miles of claimed maximum range.

Miles Max Range
55

Miles Max Range

Up to 55 miles. Actual range varies depending on rider weight, assistance level, terrain, temperature, tyre pressure and riding conditions.

Brushless Motor
250W

Brushless Motor

500W peak power · up to 20% incline.

Comfort & Everyday Features

Made for Comfortable Everyday Riding

Practical features that support comfort, visibility, storage and everyday use.

Front & Rear Lights
Front & Rear LightsImprove visibility in low light for safer evening rides.
4W High-Brightness
4W High-BrightnessA powerful 4W front light helps illuminate the road ahead.
Clear LCD Display
Clear LCD DisplayCheck speed, battery level and ride information at a glance.
16 × 2.15" Wide Tyres
16 × 2.15" Wide TyresWider tyres provide better grip and a more comfortable ride.
Built-In Rear Rack
Built-In Rear RackReady for pannier bags or a rear basket for everyday carrying.
U4 Videos

See the U4 in Action

Watch the U4 in real riding and ownership scenarios.

Everyday RidingSee how the U4 rides in real-world use.
Folding & StorageSee the U4 folding design in action.
U4 Owner ReviewHear from a U4 rider.
U4 Owner ReviewHear from a U4 rider.
Everyday RidingSee how the U4 rides in real-world use.
Everyday RidingSee how the U4 rides in real-world use.
U4 Customer Reviews

What U4 Riders Say

Reviews from U4 owners.

U4 in Real Life U4 in Real Life
★★★★★

“Excellent purchase for Campervaning.”

David Sanderson
★★★★★

“Good value for the money.”

Carl Lewis
★★★★★

“Very happy with my purchase. Arrived quickly and packaging was excellent.”

L.
Specifications

U4 Technical Specifications

Key performance, battery, fit and dimension details for the isinwheel U4 folding electric bike.

U4 electric bike
140–180 cmRecommended Rider Height
120 kg / 264 lbMax Load
26.5 kgNet Weight
4–5 hCharge Time
Performance
Motor250W
Peak Power500W
Max RangeUp to 55 miles / 88 km
Default Speed Settings6 / 10 / 15 / 25 km/h (up to 15.6 mph)
Climbing AbilityUp to 20%
Water ResistanceIPX4
FoldableYes
Removable BatteryYes
Recommended Age14+
Battery, Components & Lighting
Battery36V · 10.4Ah
Battery Capacity375Wh
Battery TypeLithium battery
Charging Time4–5 hours
Battery ProtectionTemperature protection / overload protection / water protection
Tyres16 × 2.15" pneumatic tyres
DisplayLarge LCD display
Front LightAdjustable headlight
ReflectorHandlebar reflector
Rear LightTail light
FrameAluminium alloy
Fit & Dimensions
Recommended Rider Height55.1–70.9" / 140–180 cm
Seat Height29.1–36.2"
Handlebar Height40.6"
Unfolded Size56.3 × 20.87 × 43.31"
Folded Size32.3 × 20.9 × 26.8"
FrameAluminium alloy
Net Weight58 lb / 26.5 kg
Gross Weight61.7 lb / 28 kg
🚚 Free UK DeliveryDelivery available across the UK.
🛠 Warranty SupportAfter-sales support for your U4.
💬 Customer SupportEmail, phone and live chat support.
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