The Keteles KF9 stands out for its 864 Wh battery. That is 29% above the median for folding e-bikes. It is a heavy, powerful commuter, not a light folder. You get a large battery and a 40 km/h top speed, but you carry the weight.
This bike suits riders who prioritize range and speed over portability. The 38 kg weight makes it a challenge to carry upstairs or onto a train. If you mostly ride on flat ground and can store it at ground level, the KF9 offers a lot of capacity. But if you need a truly portable folder, look elsewhere.
What the numbers say
| Spec | This bike | Median for its type |
|---|---|---|
| Battery | 864 Wh | 672 Wh |
| Weight | 38 kg | 28.6 kg |
| Torque | Not listed | 50 Nm |
| Estimated range | 61 km | 48 km |
| Price | 1284 USD | 1068 USD |
The KF9's battery is its biggest advantage. It also carries an estimated range 27% above the class median. But the weight is 33% above the median. You pay for that capacity with heft.
Questions people ask
How much does it weigh?
The Keteles KF9 weighs 38 kg. That is heavy for a folding bike. The median folding bike weighs 28.6 kg. You will feel the difference when lifting it.
How much torque does it have?
The motor torque is not listed. MathBikes cannot compare it to the class median of 50 Nm. You should not assume a specific torque figure. If torque matters to you, check with the manufacturer.
What speed class is it?
The KF9 is a standard pedelec class. That means pedal assist up to 40 km/h. It has no throttle. You must pedal to get motor support.
How far does it really go?
The manufacturer claims 70 km. MathBikes estimates 61 km, which is 13% below the claim. The estimate comes from a formula, not a test. Use the range calculator to adjust for your own conditions.
What does it cost to run?
The price is 1284 USD, which is 20% above the median for folding bikes. Running costs depend on electricity and maintenance. Use the cost calculator to see long-term expenses. The warranty is not listed, so factor that into your decision.
Where it falls short
The KF9's main drawback is its weight. At 38 kg, it is 33% heavier than the median folding bike. That makes it hard to carry, and it may be unwieldy on public transport. The battery is large, but you pay for it in portability.
Who should buy it
The Keteles KF9 is for riders who want long range and do not need to carry the bike often. It is a capable commuter if you can store it at ground level. It is not a bike you will want to carry up stairs.
- You ride more than 50 km per day and want a single charge.
- You have a secure ground-level storage spot.
- You value speed and battery capacity over light weight.
Look elsewhere if you need a bike you can lift onto a bus or into an apartment. The 38 kg weight is a dealbreaker for many. Also, if you need a throttle or a step-through frame, this bike does not offer them.
