DYU D3S 14 Inch Mini Folding Electric Bike Review — Is It Worth It? [2026]
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DYU D3S 14-Inch Mini Folding E-Bike
A 19 kg, three-step folding e-bike with a 250W motor and no throttle, priced under €500.
Is the DYU D3S worth buying?
For short city hops, yes. The D3S is the cheapest and lightest bike in this roundup apart from the SP1, and the three-step fold makes it easy to stash in a car boot or take on public transport. The trade-offs are what you would expect at €499: a small 36V 10Ah battery, 14-inch wheels and a modest 50 km claimed range. The product page shows 532 reviews and a 5,000+ units a year sales claim, which I haven't verified.
Small wheels, big convenience
DYU markets the D3S as a street-legal e-bike for Europe with no throttle, pedal assist only, plus a walk-assist mode up to 6 km/h. It ships with a front light, an LCD that shows battery level, and fenders in the box.
What makes it stand out
Three-step quick fold
The frame folds in three steps to 1170 x 200 x 720 mm. At 19 kg it is realistic to lift into a car boot, though not light enough to carry far.
250W motor, 36V 10Ah battery
The motor is rated 250W, with DYU saying it can peak at 500W. The 36V 10Ah pack charges in about 5 hours and is rated for up to 50 km of assisted riding, so it fits short and medium commutes.
Pedal assist, LCD and light
There is no throttle; the motor gives constant-power assistance as you pedal, plus walking assist up to 6 km/h. An LCD shows battery level and the headlight is bright enough for lit city streets.
Adjustable seat and puncture-resistant tires
The seat height adjusts for different riders and DYU says the tires are designed to resist punctures. A child seat is listed as optional, and front and rear baskets can be added.
Full spec sheet
| Model | DYU D3S 14 Inch Mini Folding Electric Bike |
| Motor | 250W (peak 500W per listing) |
| Battery | 36V 10Ah |
| Max speed | 25 km/h |
| Assisted range | Up to 50 km |
| Net weight | 19 kg |
| Max load | 120 kg |
| Frame | Metal |
| Unfolded size | 1170 x 500 x 990 mm |
| Folded size | 1170 x 200 x 720 mm |
| Charging time | About 5 hours |
| Plug / color | EU plug, Black |
| Warranty / trial | 12-24 months warranty; 30-day risk-free trial (per product page) |
Pros & Cons
Pros
- Light at 19 kg and folds in three steps.
- Priced at €499, down from €749.
- No throttle, pedal assist only.
- Fenders, front light and LCD included.
- Optional child seat and baskets.
Cons
- Small 36V 10Ah battery with a claimed 50 km range.
- 14-inch wheels are less comfortable on rough roads.
- Frame is described only as metal.
- Listed with an EU plug and a single black color.
- Not aimed at hills or long commutes.
Answers before you buy
Does the DYU D3S have a throttle?
How much does it weigh?
How long does it take to charge?
What is the range?
Can I add a child seat or basket?
Cheap, light and good enough for the city
The D3S is the sensible entry point to DYU's range. It won't win any range contests, but for short trips and easy storage it covers the basics for under €500.
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