MOTORS - Check your Bosch/Yamaha/giant motor spindle type. Praxis ebike cranks are made for "ISIS" spindle motors. They install on Bosch, Yamaha, Giant motors and a few other brand motors with ISIS Spindles. These cranks do NOT install on Bosch "Micro-ISIS" or "Square Taper" spindle motors
MAIN BOLT - The eCranks with ISIS Spline use M24 alloy Main bolt/Self extractor.
Q- All eBike motors have different width spindles and this directly affects the Qfactor when the crank is installed. These are the Qfactors when you install this crank on these motors :
- Q = 170mm : Standard & HD arm sets when installed on Giant/Yamaha motor
- Q = 180mm : Standard & HD arm sets when installed on Bosch motor