The DYU C9 is an mtb e-bike with a 749 Wh battery. That capacity is 11% below the median for its type, which is 840 Wh. The bike weighs 30 kg, which is 12% below the median of 34 kg. It costs 1079 USD, which is 28% below the median price of 1499 USD.
This bike suits you if you want a low-cost entry into electric mountain biking. The price is its standout figure: 28% below the median for its class. The motor is rated at 250 W and the top speed is 25 km/h. The estimated range is 43 km, which is 10% below the class median of 48 km.
What the numbers say
| Spec | This bike | Median for its type |
|---|---|---|
| Battery | 749 Wh | 840 Wh |
| Weight | 30 kg | 34 kg |
| Torque | not listed | 80 Nm |
| Estimated range | 43 km | 48 km |
| Price | 1079 USD | 1499 USD |
Questions people ask about the DYU C9
How much does the DYU C9 weigh?
The DYU C9 weighs 30 kg. That is 12% below the median weight for its type, which is 34 kg. So it is lighter than the typical mtb e-bike in this database. The maximum payload is 120 kg.
How much torque does it have?
The motor torque is not listed. The median torque for this type is 80 Nm, but the DYU C9 does not publish a figure. You cannot compare it on torque. If torque matters to you, ask the manufacturer for the missing number.
What speed class is it?
The speed class is not listed. The top speed is 25 km/h. That is the only speed figure published for this bike. You will need to check local rules to see how it is classified where you ride.
How far does it really go?
The manufacturer claims 150 km. The MathBikes estimate is 43 km, with a band of 38 to 48 km. That is 71% below the claim. The estimate uses one reference ride for every bike on the site: Tour assist, rolling terrain, mild weather, brisk pace, and an 80 kg rider. It is not a measurement. You can try your own inputs with the range calculator.
What does it cost to run?
The price is 1079 USD. The battery is 749 Wh, or 15.6 Ah at 48 V. Running costs depend on your electricity price and how often you charge. The site does not publish a running cost figure for this bike. You can work out your own with the cost calculator.
Where it falls short
The DYU C9 gives up range and battery capacity to hit its price. The battery is 749 Wh, which is 11% below the median of 840 Wh. The estimated range is 43 km, which is 10% below the median of 48 km. The manufacturer claim of 150 km is 71% above the estimate. That gap is the biggest number on this page.
Who should buy it
Buy the DYU C9 if price is your first filter and you accept the range estimate. It is 28% below the median for its type. It weighs 30 kg, which is 12% below the median of 34 kg. That makes it easier to handle than many mtb e-bikes in its class.
- You want an mtb e-bike for 1079 USD and the median price of 1499 USD is too high.
- You ride short trips where 43 km estimated range is enough.
- You want a bike that weighs 30 kg, which is 12% below the class median of 34 kg.
Look elsewhere if you need the 150 km claim to be true. The estimate is 43 km, which is 71% below that claim. Also look elsewhere if you need published torque or a speed class. Neither is listed for this bike. And if you need more than 120 kg payload, this bike is not for you.
