The DYU D3F is a folding e-bike with a price of 499 USD. That is 50% below the median price of 999 USD for its type. It is one of the most affordable folding e-bikes in the database.
This bike suits riders who want a low-cost way to try an e-bike. It has a 360 Wh battery and a hub motor with 40 Nm of torque. The D3F is not for heavy use or long commutes. It is a basic, budget-friendly option.
What the numbers say
| Spec | This bike | Median for its type |
|---|---|---|
| Battery | 360 Wh | 691 Wh |
| Weight | 41.7 kg | 26.3 kg |
| Torque | 40 Nm | 40 Nm |
| Estimated range | 25 km | 49 km |
| Price | 499 USD | 999 USD |
Questions people ask about the DYU D3F
How much does it weigh?
The DYU D3F weighs 41.7 kg. That is 59% above the median weight of 26.3 kg for folding e-bikes. It is a heavy bike for its type.
You will feel the weight when carrying it up stairs or lifting it onto a rack. The fold helps with storage, but not with carrying.
How much torque does it have?
The motor delivers 40 Nm of torque. That is exactly level with the median torque for its class. It is enough for flat ground and gentle hills.
Steep climbs will be a struggle. The motor is a hub type, which means it pushes from the rear wheel.
What speed class is it?
The DYU D3F is a standard pedelec class e-bike. It has a top speed of 24 km/h. That is typical for this class.
There is no throttle on this bike. You pedal to get assistance.
How far does it really go?
The manufacturer claims a range of 60 km. MathBikes estimates the real range at 25 km, with a band of 22 to 28 km. That estimate is 58% below the claim.
The estimate comes from a formula using battery capacity and a reference ride. It is not a measurement. You can adjust the assumptions with the range calculator.
The estimated range is 49% below the median of 49 km for its type. The battery is 360 Wh, which is 48% below the median of 691 Wh.
What does it cost to run?
The purchase price is 499 USD. Running costs depend on electricity and maintenance. The warranty is not listed, so you cannot know what is covered.
Use the cost calculator to estimate long-term costs. A low upfront price can be offset by higher maintenance or a shorter lifespan.
Where it falls short
The DYU D3F makes a clear trade-off: it is cheap, but you give up range and weight. The battery is 360 Wh, which is small. The estimated range is 25 km, which is short for many riders.
The weight is a major drawback. At 41.7 kg, it is 59% heavier than the median folding bike. That makes it hard to carry or maneuver in tight spaces.
Who should buy it
The DYU D3F is for riders who want the lowest possible entry price. It is fine for short trips on flat ground. You must be comfortable with its weight and limited range.
- You need a bike for a 2 km commute on flat roads.
- You have a place to store it that does not require lifting.
- You want to test if an e-bike suits you without spending much.
Look elsewhere if you need to carry the bike often, ride more than 25 km per charge, or climb hills. A heavier bike with a small battery will frustrate you. Consider a model with a larger battery and lighter frame, even if it costs more.
