Originally Posted by
randomgear
Your speed may be limited by wheel RPM. My Bafang mid-drive is, it has a magnet mounted to the rear wheel and a sensor on the chainstay. There is an easy hack that might work: mounting the magnet to the crank arm and moving the sensor. Still, with a 30t chainring I suspect that you would spin out if using e-assist.
What's your current top speed with throttle?
1. My Giant has an unhelpful setup. The sensor is built into the chainstay so if I move the magnet there will be nothing for the sensor to read.
2. It's a 42T chainring not 30. Would I spin out at 42T?
3. My fastest speed to date was 28 mph with maximum pedal assist. (The bike lacks a throttle.) The assist is significant up to 19 mph and then drops to very little between 20 to 27 mph.