The Koolux BK10S is a folding e-bike with a 624 Wh battery and a 36.5 kg weight. That weight is 28% above the median for its type, making it one of the heavier folders. It suits riders who value battery capacity over portability. You get a standard pedelec with a hub motor, but no throttle.
Its price is 960 USD, which is 10% below the median for folding e-bikes. The manufacturer claims a 90 km range, but our estimate is 44 km. That estimate is 51% below the claim. If you want a folding bike for daily commutes, the BK10S is worth a look, but check the weight first.
What the numbers say
| Spec | This bike | Median for its type |
|---|---|---|
| Battery | 624 Wh | 672 Wh |
| Weight | 36.5 kg | 28.6 kg |
| Torque | 0 Nm | 50 Nm |
| Estimated range | 44 km | 48 km |
| Price | 960 USD | 1068 USD |
Questions people ask about the Koolux BK10S
How much does it weigh?
The BK10S weighs 36.5 kg. That is 28% above the median for folding e-bikes. You will feel the extra weight when carrying it up stairs or lifting it onto a rack.
How much torque does it have?
The motor torque is listed as 0 Nm. That is not a real figure. The manufacturer does not publish a torque value. Without that number, you cannot compare hill-climbing power directly.
What speed class is it?
It is a standard pedelec class, with a top speed of 25 km/h. That means the motor assists only while you pedal, up to that speed. No throttle is fitted.
How far does it really go?
The manufacturer claims 90 km. Our estimate is 44 km, with a band from 39 to 50 km. That estimate is 51% below the claim. The estimate comes from a formula using one reference ride, not a test. See the range calculator to adjust for your own conditions.
What does it cost to run?
The price is 960 USD, which is 10% below the median for its type. Running costs depend on electricity and maintenance. The battery is 624 Wh, which is 7% below the median. Use the cost calculator to estimate yearly costs.
Where it falls short
The BK10S is heavy. At 36.5 kg, it is 28% above the median for folding bikes. That extra weight makes it less portable, which is a key reason to buy a folder. Also, the estimated range is 8% below the median, so you get less distance per charge than average.
Who should buy it
The BK10S suits riders who want a folding bike with a large battery and a lower price. It is not for anyone who must lift the bike regularly. Consider your storage and transport needs before you buy.
- You have a place to store a heavy folding bike, like a garage or ground-floor hallway.
- You value the lower price over the median and accept the extra weight.
- You ride mostly on flat terrain and do not need high torque for steep hills.
Look elsewhere if you need a lightweight folder for carrying onto trains or up stairs. Also consider other options if you want a published torque figure or a longer estimated range. The BK10S is a budget choice, but it asks you to trade portability for savings.
