The Duotts F20 stands out for its battery. It carries a 1404 Wh pack, which is 109% above the median for folding e-bikes. That is the largest battery in its class. This bike is built for long rides, not short hops.
The F20 is a folding e-bike with a hub motor and a 25 km/h top speed. It suits riders who want a big range in a foldable frame. But it is heavy. At 38 kg, it is 33% above the median weight for its type. You will feel that when lifting or carrying it.
What the numbers say
| Spec | This bike | Median for its type |
|---|---|---|
| Battery | 1404 Wh | 672 Wh |
| Weight | 38 kg | 28.6 kg |
| Torque | 70 Nm | 50 Nm |
| Estimated range | 100 km | 48 km |
| Price | 1392 USD | 1068 USD |
Questions people ask about the Duotts F20
How much does the Duotts F20 weigh?
The F20 weighs 38 kg. That is heavy for a folding e-bike. The median weight for its type is 28.6 kg. You will need to plan for this if you carry it up stairs or onto a train.
How much torque does the motor have?
The hub motor delivers 70 Nm of torque. That is 40% above the median for folding e-bikes. It should handle hills well, though the bike's weight will offset some of that advantage.
What speed class is the Duotts F20?
It is a standard pedelec class. The motor assists up to 25 km/h. It has no throttle. You pedal to get power.
How far does the Duotts F20 really go?
The manufacturer claims 140 km. MathBikes estimates 100 km on a reference ride. That estimate uses a formula based on battery capacity and consumption. The estimate is 29% below the claim. Real-world range depends on terrain, rider weight, and assist level. Use the range calculator to see how different conditions change the estimate.
What does it cost to run?
The price is 1392 USD. That is 30% above the median for its type. Running costs depend on electricity and maintenance. The warranty is not listed, so you cannot know what coverage you get. Use the cost calculator to compare long-term costs.
Where it falls short
The F20's biggest drawback is its weight. At 38 kg, it is 33% above the median. That makes it less portable than other folding bikes. The battery is also large, which adds to the weight. If you need to lift it often, this is a real problem.
Who should buy it
The Duotts F20 is for riders who prioritize range over weight. It suits long commutes or multi-day tours where charging is rare. It is not for anyone who needs to carry the bike regularly.
- You ride more than 50 km each way and cannot charge at work.
- You want a folding bike for storage, not for carrying.
- You are a heavier rider, up to 150 kg payload.
Look elsewhere if you need a light folding bike. The F20's weight makes it awkward to lift. Also, if you want a throttle, this bike does not have one. Consider a different model if those features matter.
