Shimano STEPS SM-CRE80-12-B ChainringSmoother PedalingIf you're using a STEPS electric motor in your bike, chances are you'll need some components that can withstand the additional torque. The Shimano STEPS SM-CRE80-12-B Chainring is designed for use with Shimano STEPS drive units. It is designed with Shimano's Dynamic Chain Engagement+ to provide more chain retention and smoother pedaling, even over bumpy terrain. It has a 53mm Boost chainline. FeaturesDesigned for use with Shimano STEPS drive unitsDesigned with Shimano's Dynamic Chain Engagement+ to provide more chain retention and smoother pedalingChainring for 53mm chainlineSPECIFICATIONSDrive Train Speed12-SpeedTooth Count34T, 36T, 38TBolt Center Diameter104mmMaterialAluminumIntended UseE-BikeWeightN/A | Shimano | STEPS SM-CRE80-12-B Chainring 34T 12 Speed | Aluminum