E-Sparkz
iSinwheel U4 Foldable Step-thru Electric Bike
iSinwheel U4 Foldable Step-thru Electric Bike
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Description
The iSinwheel U4 Foldable E-Bike is built for riders who want power, range, and everyday convenience in one smart design. Powered by a 250W motor (500W peak), the U4 offers smooth acceleration and confident climbing ability, handling 20% inclines with ease. Whether you're commuting daily or exploring on weekends, it delivers a comfortable, efficient ride.
Its 36V 10.4Ah removable battery offers an impressive range of up to 55 miles (88 km) per charge, supported by a smart BMS system for improved safety, battery protection, and long-term reliability. Choose between 4 riding modes to match your pace — from relaxed pedal assist to full electric cruising — with a top speed of 19 mph.
The U4 is foldable and lightweight, making it easy to store in apartments, offices, or a car boot. The removable batterymeans you can charge anywhere, even without bringing the whole bike inside.
Comfort comes built-in: the 16×2.15" pneumatic tires and well-balanced frame provide smooth traction and stability, while the ergonomic riding position suits daily travel. A 264 lb (120 kg) load capacity makes it suitable for a wide range of riders.
Whether you’re beating city traffic, commuting stress-free, or riding just for fun — the U4 keeps every journey simple, efficient, and enjoyable.
Technical Specification
Performance
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Motor: 250W rated / 500W peak
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Max Range: Up to 55 miles (88 km)
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Default Speed Modes: 6 / 10 / 15 / 25 km/h (up to 15.6 mph)
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Unlockable Speed: 15 / 25 / 30 km/h (up to 19 mph)
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Climbing Ability: Up to 20% incline
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Zero-Start: Yes
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Foldable Frame: Yes
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Removable Battery: Yes
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Water Resistance: IPX4
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Recommended Age: 14+
Battery & Charging
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Battery Capacity: 36V, 10.4Ah (375Wh)
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Battery Type: New-generation Lithium battery with BMS protection
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Charging Time: 4–5 hours
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Charger Input: AC 100–240V, 50/60Hz, 2.5A
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Charger Output: DC 42V, 2A
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Battery Protection Includes:
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Temperature protection
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Overload protection
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Waterproof protection
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Frame & Build
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Frame Material: Aluminum alloy
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Net Weight: 58 lbs (26.5 kg)
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Gross Weight: 61.7 lbs (28 kg)
Display & Lighting
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Display: Large LCD screen (speed, battery level, mode, trip info)
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Lighting System:
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Adjustable headlight
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Tail light
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Handlebar reflector
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Wheels & Comfort
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Tyres: 16 × 2.15" pneumatic tyres
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Seat Height: Adjustable 29.1" – 36.2"
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Handlebar Height: 40.6" from ground
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Recommended Rider Height: 55.1" – 70.9" (140–180 cm)
Dimensions
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Unfolded Size: 56.3" × 20.87" × 43.31"
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Folded Size: 32.3" × 20.9" × 26.8"
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- Description
- Technical Specification
- Delivery & Returns
The iSinwheel U4 Foldable E-Bike is built for riders who want power, range, and everyday convenience in one smart design. Powered by a 250W motor (500W peak), the U4 offers smooth acceleration and confident climbing ability, handling 20% inclines with ease. Whether you're commuting daily or exploring on weekends, it delivers a comfortable, efficient ride.
Its 36V 10.4Ah removable battery offers an impressive range of up to 55 miles (88 km) per charge, supported by a smart BMS system for improved safety, battery protection, and long-term reliability. Choose between 4 riding modes to match your pace — from relaxed pedal assist to full electric cruising — with a top speed of 19 mph.
The U4 is foldable and lightweight, making it easy to store in apartments, offices, or a car boot. The removable batterymeans you can charge anywhere, even without bringing the whole bike inside.
Comfort comes built-in: the 16×2.15" pneumatic tires and well-balanced frame provide smooth traction and stability, while the ergonomic riding position suits daily travel. A 264 lb (120 kg) load capacity makes it suitable for a wide range of riders.
Whether you’re beating city traffic, commuting stress-free, or riding just for fun — the U4 keeps every journey simple, efficient, and enjoyable.
Performance
-
Motor: 250W rated / 500W peak
-
Max Range: Up to 55 miles (88 km)
-
Default Speed Modes: 6 / 10 / 15 / 25 km/h (up to 15.6 mph)
-
Unlockable Speed: 15 / 25 / 30 km/h (up to 19 mph)
-
Climbing Ability: Up to 20% incline
-
Zero-Start: Yes
-
Foldable Frame: Yes
-
Removable Battery: Yes
-
Water Resistance: IPX4
-
Recommended Age: 14+
Battery & Charging
-
Battery Capacity: 36V, 10.4Ah (375Wh)
-
Battery Type: New-generation Lithium battery with BMS protection
-
Charging Time: 4–5 hours
-
Charger Input: AC 100–240V, 50/60Hz, 2.5A
-
Charger Output: DC 42V, 2A
-
Battery Protection Includes:
-
Temperature protection
-
Overload protection
-
Waterproof protection
-
Frame & Build
-
Frame Material: Aluminum alloy
-
Net Weight: 58 lbs (26.5 kg)
-
Gross Weight: 61.7 lbs (28 kg)
Display & Lighting
-
Display: Large LCD screen (speed, battery level, mode, trip info)
-
Lighting System:
-
Adjustable headlight
-
Tail light
-
Handlebar reflector
-
Wheels & Comfort
-
Tyres: 16 × 2.15" pneumatic tyres
-
Seat Height: Adjustable 29.1" – 36.2"
-
Handlebar Height: 40.6" from ground
-
Recommended Rider Height: 55.1" – 70.9" (140–180 cm)
Dimensions
-
Unfolded Size: 56.3" × 20.87" × 43.31"
-
Folded Size: 32.3" × 20.9" × 26.8"
Order Confirmation: As soon as you place your order, we will pre-authorise your card however your card will not be charged. We will then contact our supplier to confirm that the product you have purchased is available for immediate shipment. Once confirmed we will process the payment and your order will be dispatched straight away. If there is any delay such as an item which is on backorder, we will void the pre-authorisation and contact you to let you know.
Order Delivery: Once your order has been placed, assuming it is in stock and available for dispatch, we will charge your card and your order will be dispatched within 5 working days. We’ll send you tracking details by email within 24 hours of your order being dispatched. If you have not received tracking details within 6 working days, please reach out to us via email at contact@e-sparkz.co.uk so that we can help.
Damages: We ask that you thoroughly inspect all items at the point of delivery. We advise you not to accept delivery of any damaged items. If you discover that an item has been damaged, please send clear photos of the damaged items to contact@e-sparkz.co.uk so that we can open an insurance claim on your behalf.
Cancellations & Refunds: Any orders cancelled after 48 hours of placing the order may be subject to additional fees. If your order has been dispatched, you (the buyer) will be responsible for any costs associated with returning the item. Any refunds can only be issued to the same payment method which was used to place the order.