Mini folding electric bike 14" and 19 kg – DYU D3S

The D3S is a mini electric bike with 14-inch wheels: it takes up very little space when folded and, at 19 kg, is easy to move around. It's perfect for the "last mile" (from the car or station to the office) and for anyone with no room at home. Its 360 Wh battery gives about 25–35 km real-world.

Guide price: €499 (VAT included). See the full data in the specifications on this page.

Estimated real-world range

The manufacturer claims up to 50 km, measured with minimum assistance, flat ground and a light rider. In normal use (medium assistance, a 75–85 kg adult, some hills and stops) we estimate between 26 and 36 km per charge, based on 10–14 Wh/km with its 360 Wh battery. With maximum assistance, cold weather or steep climbs, expect the lower end of the range.

Example: for a 10 km commute each way, you would need to charge it roughly every 1–1 working days.

Who is the DYU D3S for?

• Riders who need to carry it: at 19 kg it can be taken up stairs or onto a train without much effort.

Do you need a licence or number plate?

No. With 250 W rated power and assistance up to 25 km/h, it is treated as a bicycle in the EU: no licence, no registration and it can use cycle lanes. In Spain helmets are compulsory on interurban roads and for under-16s everywhere.

Alternatives worth comparing

• DYU C2 (€549, +€50): 16" folding e-bike with 2.5" tyres, a 48 V battery and up to 40 km claimed. Compact and stable for the city.…
• iSinwheel U4 (€549, +€50): iSinwheel U4 folding electric bike: 500 W motor, up to 88 km of range and 0–25 km/h in 3.8 s. Compact enough f…
• iSinwheel U1 (€399, −€100): The U1 puts an electric bike into a compact format with 14-inch wheels and a folding handlebar.…

Need help choosing? Read our buying guide.

Frequently asked questions

What is the real-world range of the DYU D3S?

In normal use we estimate between 26 and 36 km per charge; the manufacturer claims up to 50 km in ideal conditions.

Do you need a licence for the DYU D3S?

No. It is a 250 W pedal-assist bicycle with assistance up to 25 km/h, so no licence, registration or compulsory insurance is required.

How much does the DYU D3S weigh?

19 kg, and it folds for storage or transport.

Where can I buy the DYU D3S?

NovoDix compares the model and sends you to the official brand store, where the purchase is completed with its warranty and delivery.