The isinwheel U4 Foldable is a folding e-bike that stands out for its low price. At 586 USD, it is 45% below the median for its type. That makes it one of the most affordable folding bikes in our database.
It is a standard pedelec with a hub motor. The bike weighs 26.3 kg, which is 8% lighter than the class median. It folds, but it has no throttle and no step-through frame. This bike suits riders who want a basic, low-cost e-bike for short trips.
What the numbers say
| Spec | This bike | Median for its type |
|---|---|---|
| Battery | 374 Wh | 672 Wh |
| Weight | 26.3 kg | 28.6 kg |
| Torque | Not listed | 50 Nm |
| Estimated range | 27 km | 48 km |
| Price | 586 USD | 1068 USD |
Questions riders ask about the isinwheel U4 Foldable
How much does it weigh?
The isinwheel U4 Foldable weighs 26.3 kg. That is 8% below the median for folding e-bikes. It is not the lightest, but it is lighter than many in its class.
How much torque does it have?
The motor torque is not listed in the specifications. Without that number, we cannot compare it to the class median of 50 Nm. If torque matters to you, check with the manufacturer before buying.
What speed class is it?
It is a standard pedelec class. That means the motor assists up to 31 km/h. You pedal to get assistance, and there is no throttle.
How far does it really go?
The manufacturer claims a range of 89 km. Our estimate is 27 km, with a band of 24 to 30 km. That is 70% below the claim. The estimate comes from a formula, not a test. You can see how it works with the range calculator.
What does it cost to run?
The purchase price is 586 USD. Running costs depend on electricity and maintenance. Use the cost calculator to see an estimate. The warranty is not listed, so factor that into your decision.
Where it falls short
The biggest trade-off is range. The battery holds 374 Wh, which is 44% below the class median of 672 Wh. That leads to an estimated range of 27 km, far below the class median of 48 km. If you need to travel more than 24 to 30 km on a charge, this bike will not do it.
Who should buy it
This bike fits a specific buyer. You want a folding e-bike for short, flat trips. You are willing to trade range for a low upfront cost.
- You ride less than 24 km per charge and can charge often.
- You need a folding bike for storage or multi-modal commutes.
- You want the lowest possible entry price for an e-bike.
Look elsewhere if you need long range, high torque, or a throttle. The U4 Foldable is not for heavy cargo or steep hills. Check the class median for range and torque before you decide.
