DYU D3F 14 Inch Folding Electric Bike
- Wheel Size: 14 inches
- Lithium Battery Energy Content: 360 Wh
- Wattage: 250 watts
- Electric Assist Type: Electric Assist
Last refreshed Jun 21, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A capable, easy to fold commuter e-bike for city riders who do not need long range or steep hill climbing, with the tradeoff of a front end that can lift when pedaling hard uphill.
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ASIN: B09D7L9L5KModel: D3FCategory: Electric Bicycles
Overview
A 14 inch folding electric bike with a 250W motor and 36V 10Ah lithium battery, offering pure electric, pedal-assist, and manual pedaling modes, aimed at commuters who want something small enough to fold into a trunk or carry onto transit.
Listed range is 40-45 miles though the spec details also cite 37-40 miles under electric-only, flat-road, full-power conditions with a rider under 165 lb, so real-world range will vary with rider weight and terrain.
- 250W motor, 36V 10Ah lithium battery
- 14 inch folding aluminum alloy frame
- Front and rear disc brakes
- 8-second hold-to-cruise speed lock
Who it's for
Suits commuters and casual riders, including older adults, who want a lightweight, foldable bike for flat city riding rather than serious distance or hill climbing. One reviewer over 60 found it an easier alternative to a standard bike.
Pros and cons
- Folds small enough for a car trunk or transit
- Rated to carry riders up to about 265 lb
- Three modes cover manual to full electric
- Easy assembly reported by most buyers
- Front wheel can lift when pedaling hard uphill
- At least one unit arrived with an E3 error
- Customer service slow to respond to questions
Specifications
| Brand | DYU |
|---|---|
| Model | D3F |
| Dimensions & fit | |
| Wheel Size | 14 incheslower than 93% of 409 electric bicycles |
| Capacity & performance | |
| Number Of Speeds | 1 |
| Bicycle Drivetrain Type | Electric |
| Bicycle Gear Shifter Type | Twist Grip |
| Age Range Description | Adult, Teen |
| Power & efficiency | |
| Lithium Battery Energy Content | 360 Whlower than 94% of 221 electric bicycles |
| Wattage | 250 wattslower than 98% of 197 electric bicycles |
| Power Source | Electric Motor |
| Construction & materials | |
| Frame Material Type | Aluminum |
| Wheel Material | Aluminum |
| Color | Black |
| Included components | |
| Included Components | Charger, Electric Bike |
| Warranty & support | |
| Warranty Description | 2 years |
| Warranty Type | Limited |
| Other details | |
| Electric Assist Type | Electric Assist |
| Brake Style | Disc |
| Suspension Type | Rear |
| Bike Type | Electric Bike |
| Is Assembly Required | No |
| Additional Features | Foldable, Lightweight, Portable |
Closest rivals on specs
Frequently asked questions
How far can the DYU D3F travel on a charge?
The listing states 40-45 miles, while the spec details cite 37-40 miles under electric-only, flat-road conditions for riders under 165 lb.
Does the D3F fold for storage or transit?
Yes, it is built as a compact folding frame meant to fit in a car trunk or be carried onto a train or bus.