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Cysum
Cysum Aptum 8F
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 | Mid-drive |
|---|---|
| Motor power | — |
| Torque | 380 Nm |
| Battery capacity | 2880 Wh |
| Removable battery | — |
| Charge time | 4 h |
Performance
| Range | 120 km |
|---|---|
| Max assisted speed | — |
| Max rider weight | — |
Dimensions & equipment
| Bike weight | — |
|---|---|
| Wheel diameter | 19 " |
| Gears | — |
| Brakes | Hydraulic 4-piston brake |
| Suspension | Front and rear |
| Manufacturer warranty | — |
| Frame size | 16 inch |
Other manufacturer data
Tyres: 19 inch front, 18 inch rear, CST all-terrain
Suspension: KKE dual suspension: 210mm front fork, 85mm rear
Lighting: Front and rear lights with turn signals
Delivery & assembly
Assembly
Requires assembly on arrival.
What's in the box
- Electric dirtbike
- Front and rear baskets
- 72V 40Ah battery
Good to know
IP67 water-resistance rating.
Analysis
The Aptum 8F is a heavy-duty electric dirtbike, clearly in a different segment from most pedelecs in this comparison: a mid-drive motor with an impressive 380Nm of torque, powered by a 72V 40Ah battery (roughly 2,880Wh; the title rounds this to 75V as a marketing figure). The stated range is 120 km, with a 4-hour charge time and an IP67 water-resistance rating.
It has KKE dual suspension (210mm front, 85mm rear) and hydraulic 4-piston brakes for direct braking on rough terrain, plus 19-inch front and 18-inch rear CST tyres for grip in mud, sand or on rocky roads.
Amazon lists no motor power in watts and no top speed. Given the high torque and motor size, this is likely not a regular pedelec but a more powerful electric vehicle; check before buying whether this model counts as a bicycle or a moped/motor vehicle in the Netherlands, as that affects registration and licence requirements. At €4,299 this is by far the most expensive bike in the whole comparison.
Pros
- Very high torque (380Nm) via a mid-drive motor
- Large battery (roughly 2,880Wh) with up to 120 km of range
- Dual suspension and hydraulic 4-piston brakes
- IP67 water-resistance rating
Cons
- By far the most expensive bike in the comparison (€4,299)
- No listed motor power or top speed
- May not be classified as a regular bicycle in the Netherlands, check before buying
- No visible review count on Amazon
Ideal for: Experienced off-road riders after a powerful electric dirtbike, who check Dutch regulations for this vehicle type beforehand.
What buyers say
Amazon shows no visible review count for this model; too early to give a reliable read.
No full-text reviews on the Amazon product page yet.
Reviews as shown on the Amazon product page at the time of capture (21-08-2026).
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