MOTORS - Check your motor spindle type. Our standard & HD alloy cranks are made for "ISIS" spindle motors. They install on Bosch, Yamaha, Brose, Fazua 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. The "M30/SL" eCranks use M30 alloy Main bolt/Self extractor.
SPECIALIZED - Check your Specialized motor spindle type. Standard Levo/Kenevo/Como/Vado have an ISIS spindle. The "SL" Levo or Creo family use the M30/SL eCrank armsets.
Qfactor- 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 :
- 170mm Q : Standard & HD on a Giant/Yamaha spindle motor
- 180mm Q : Standard & HD on a BOSCH spindle motor
Specialized Levo/Kenevo and M30 SL Both these alloy sets are made specific for these bike/motors and have a 182mm Qfactor