4 ms·
The Bosch system is crank driven, right? In hind sight I regret not going for something like that. The Bionx hub is ludicrously heavy, with short spokes prone t
by sundvor 9y ago
The Bosch system is crank driven, right? In hind sight I regret not going for something like that. The Bionx hub is ludicrously heavy, with short spokes prone to breakage, and required (at the time) its own crappy cassette.
I had to crack the 25 km/h speed limit restriction as going above it required an almost Herculean effort. It should have reverted to an assistance level that offset the weight / drag, but alas.. it just turned off.
Batteries were easy enough to replace though.
- johansch 9y agoYeah, it's placed in the crank house. What I like the most about this is the sensor system. I am pretty sure there is an actual torque sensor in there. This makes for a very smooth acceleration phase. Along with a back wheel magnet sensor to keep the speed limit. Last year I made a homemade hack for this.. I used a microcontroller, an electromagnet and a magnetic sensor from a cheapo bike computer to forget every second impulse towards the Bosch system. It worked. The speed limit changed to 50 km/h. Ended up not bothering to weather-proof it though. 25 km/h is enough most of the time anyway.