The Koolux BK6S PRO is a folding e-bike with a 1123 Wh battery. That is 67% above the median battery for its class. It is a heavy bike, at 39.5 kg, and it has a hub motor. It suits riders who want a long estimated range and do not need to carry the bike often.
The bike has a manufacturer claimed range of 150 km. MathBikes estimates 79 km, which is 47% below that claim. The estimate is based on a standard reference ride, not a test. If you value a large battery and a folding frame, this bike is worth a look.
What the numbers say
| Spec | This bike | Median for its type |
|---|---|---|
| Battery | 1123 Wh | 672 Wh |
| Weight | 39.5 kg | 28.6 kg |
| Torque | 0 Nm | 50 Nm |
| Estimated range | 79 km | 48 km |
| Price | 1230 USD | 1068 USD |
Questions people ask about the Koolux BK6S PRO
How much does it weigh?
The Koolux BK6S PRO weighs 39.5 kg. That is 38% above the median weight for folding e-bikes, which is 28.6 kg. It is not a light bike to lift or carry.
How much torque does it have?
The motor torque is listed as 0 Nm. That is unusual, and it is not comparable to the class median of 50 Nm. The motor type is hub, but the torque specification is not published in a standard way.
What speed class is it?
It is a standard pedelec class, with a top speed of 25 km/h. That means it assists you up to that speed. It has no throttle.
How far does it really go?
The manufacturer claims 150 km. MathBikes estimates 79 km, which is 47% below that claim. The estimate is 65% above the median estimated range for its class, which is 48 km. Use the range calculator to see how different conditions affect the estimate.
What does it cost to run?
The price is 1230 USD, which is 15% above the median for its type. Running costs depend on electricity and maintenance. The warranty is not listed, so factor that into your budget. Use the cost calculator to compare long-term costs.
Where it falls short
The Koolux BK6S PRO is heavy. At 39.5 kg, it is 38% above the median for folding bikes. That weight makes it harder to carry upstairs or onto a train. It also has no throttle, which some riders miss on a heavy bike.
Who should buy it
This bike suits riders who prioritize range over portability. The large battery gives an estimated range that is 65% above the class median. It also fits riders who want a folding frame for storage, not for carrying.
- You ride long distances and want a battery that lasts.
- You store the bike in a garage or shed and rarely lift it.
- You want a folding bike with a standard pedelec speed.
Look elsewhere if you need a light bike for commuting with stairs. The 39.5 kg weight will be a burden. Also consider other options if you want a throttle or a higher torque motor.
