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Cysum
Cysum MTB Cm520-29
Editorial rating
What does this e-bike stand out for?
Editorial scores from 0 to 10, calculated from the spec sheet against the rest of the catalogue, not manufacturer data.
Full spec sheet
Motor & battery
| Motor position | — |
|---|---|
| Motor power | 250 W |
| Torque | 75 Nm |
| Battery capacity | 672 Wh |
| Removable battery | Yes |
| Charge time | — |
Performance
| Range | 90 km |
|---|---|
| Max assisted speed | — |
| Max rider weight | 180 kg |
Dimensions & equipment
| Bike weight | 31 kg |
|---|---|
| Wheel diameter | 29 " |
| Gears | 7 |
| Brakes | Hydraulic disc brake |
| Suspension | Front |
| Manufacturer warranty | 3 years |
| Frame size | — |
Other manufacturer data
Tyres: 29 x 2.35 inch
Suitable height: from 170 cm
Equipment: Headlight, taillight, fenders, rear rack
Delivery & assembly
Assembly
Arrives roughly 90% pre-assembled; smaller parts need fitting yourself.
What's in the box
- Electric mountain bike
- Removable 48V 14Ah battery
- Fender
- Rear rack
Good to know
3-year warranty on the frame, 1 year on the motor, battery and drivetrain.
Analysis
The Cm520-29 is an electric mountain bike with 29-inch wheels and 2.35-inch tyres, powered by a motor delivering 75Nm of torque and a 7-speed freewheel for climbing. The removable 48V 14Ah battery (672Wh) gives, per the manufacturer, a range of 75 to 90 km on a full charge.
It has a front shock absorber, a comfortable saddle, and is fully equipped with a headlight, taillight, fenders and rear rack. Recommended for riders from 170 cm. The manufacturer offers a 3-year warranty on the frame and 1 year on the motor, battery and drivetrain, and it arrives roughly 90% pre-assembled.
With just 2 reviews (averaging 3.0 out of 5), this is one of the lowest-rated bikes in the comparison: one buyer reports a kickstand coming loose after 1,300 km, another received a non-working bike with a broken battery on arrival. Treat these figures with caution given the low review count, but be aware.
Pros
- 29-inch wheels, suited to taller riders
- Removable battery (672Wh) with up to 90 km of range
- 3-year warranty on the frame
- Hydraulic disc brakes and a front shock absorber
- Fully equipped: lights, fenders, rear rack
Cons
- Lowest rating in this part of the comparison (3.0 out of 5)
- One of the 2 reviews reports a non-working bike on arrival
- No listed top speed
- Only 2 reviews, so little statistical certainty
Ideal for: Taller riders (from 170 cm) after an electric mountain bike with big wheels, willing to weigh the limited review volume.
What buyers say
With only 2 reviews (averaging 3.0 out of 5), this review volume is too small to draw conclusions from, but one of the two reports a bike that didn't work on arrival.
-
Amazon customer · 2026 Verified purchase
Very good value for money. After 1,300 km the kickstand came loose and touched the brake disc; fixed with extra screws.
-
Amazon customer · 2026 Verified purchase
The bike I received didn't work. First the battery was broken, and after replacement it still didn't work.
Reviews as shown on the Amazon product page at the time of capture (21-08-2026).
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