The Fafrees F20 Ultra HS is a mountain e-bike with a 1200 Wh battery. That battery is 43% above the median for its type. It also has a 79 Nm hub motor and a top speed of 45 km/h. This bike is for riders who want long range and high speed, not for those who need to carry it upstairs.
At 39.9 kg, it is 17% heavier than the typical mountain e-bike. The weight is a direct trade-off for the large battery. You get an estimated range of 68 km, which is 39% above the class median. If you prioritize distance over agility, this bike makes sense.
What the numbers say
| Spec | This bike | Median for its type |
|---|---|---|
| Battery | 1200 Wh | 840 Wh |
| Weight | 39.9 kg | 34.2 kg |
| Torque | 79 Nm | 80 Nm |
| Estimated range | 68 km | 49 km |
| Price | 2482 USD | 1554 USD |
What riders ask about the Fafrees F20 Ultra HS
How much does it weigh?
The Fafrees F20 Ultra HS weighs 39.9 kg. That is 17% above the median for mountain e-bikes. You will feel the weight when lifting it or pushing it up a steep hill. It is not a bike you want to carry over obstacles.
How much torque does the motor have?
The hub motor delivers 79 Nm of torque. That is 1% below the median for its type. It is enough for most climbs, but not exceptional. If you ride very steep terrain, you might want more torque.
What speed class is it?
This is a fast class e-bike. It assists up to 45 km/h, which is above the 25 km/h limit for standard e-bikes. Check your local rules before riding on public paths. You may need a license or registration.
How far does it really go?
The manufacturer claims 100 km. MathBikes estimates 68 km, with a band of 60 to 76 km. That estimate is 32% below the claim. The estimate comes from a formula, not a test. Use the range calculator to see how different conditions change it.
What does it cost to run?
The purchase price is 2482 USD. Running costs depend on electricity and maintenance. The battery is large, so charging costs more than a smaller battery. Use the cost calculator to compare over time. The warranty is not listed, so factor that into your decision.
Where it falls short
The Fafrees F20 Ultra HS is heavy. At 39.9 kg, it is 17% above the median. That weight comes from a 1200 Wh battery, which is 43% above the median. You trade portability for range. The bike is not foldable and has no step-through frame, so mounting and storing it requires effort.
Who should buy it
This bike suits riders who value range and speed over lightness. It is for commuters with long distances or riders who want to explore without worrying about battery. It is not for anyone who has to lift their bike regularly.
- You ride more than 60 km per trip and want a buffer.
- You want a fast class e-bike that can reach 45 km/h.
- You have a place to store a 39.9 kg bike and do not need to carry it.
Look elsewhere if you need a light bike or if you plan to lift it onto a rack. The 17% extra weight is a constant companion. Also, if you ride mostly flat short trips, a smaller battery would save money and weight.
