EC-3 cranks compatible with the following motors which use a steel ISIS spline:
- Brose Mag
- Fazua-R50
- TQ-HPR50
- SRAM "Powertrain"
- Bafang M800
- Specialized Levo4
Not compatible with: 

Gen 1-3 versions Specialized Levo/Kenevo/Vomo/Vado
GUIDESECrank Fitment Guide: