The motor and controller are hidden in the seat tube, the battery is stowed in a saddlebag and the small switch on the handlebars is not even noticeable. 1.8 kg additional weight including battery is a real statement in the test. Of the 200 W motor power, approx. 110 watts are delivered to the rear wheel at an optimal 75 revolutions (cadence) per minute. The motor power is regulated via the cadence, the speed via the gears. If you switch on the very quiet motor, you first have to listen more closely to see if it is switched on at all. This is because the additional power is very discreet. The Vivax system thus strongly supports the training character and keeps the rider's own performance high - the riding feeling of a conventional mountain bike is definitely retained. The motor only really needs to be switched on on steep ramps, otherwise you can leave it off. Because a Vivax bike rolls as well as a normal bike even with the motor switched off. For friends of non-motorised off-road sports who are only looking for a little e-support from time to time.
Test summary of the Vivax Assist 4.75
The well-balanced Vivax drive is suitable for riders who want to compensate for subtle differences in performance and maintain the original feel of their bike as much as possible. Advantage: When the motor is switched off, the bike rolls normally. Unfortunately, this is only possible on frames with a straight seat tube centred on the bottom bracket. Also available as a comfortable all-mountain complete bike or frame kit. For connoisseurs.
Advantages and disadvantages
+ Clean, uncluttered look
+ Encourages smooth gliding
+ Mountains are mountains again
- Saddlebag rattles
- Seat post can only be lowered to a limited extent
Technical data
Motor/position Mid-motor, 200 W
Max. Torque K. A.
Tested battery Saddlebag, 30 V, 9 Ah, Li-Ion
Total weight approx. 1.8 kg incl. battery
Functions On/off switch, optional programming of cadence, battery and motor power
Installation by specialised dealer Yes
Range km/altitude approx. K. A., 1000 hm
Price motor kit 3057 Euro
Price complete bike 5599 Euro
Info www.vivax-assist.com
