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 our M24 alloy Main bolt/Self extractor.  The "M30/SL" eCranks use our 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
• 176mm 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