TA E-Single 104pcd ChainringSpecifically designed for use with electric bike (E-bike) motor systems with 104mm 4-arm mounting, this chainring features a robust aluminium construction that allows it to handle the increased speed and torque produced by electric bike motors. 100% designed and made in France, this model offers excellent quality for E-bike riders who want a durable and dependable chainring for their ride.Compatibility:This chainring is compatible with the following electric bike motor systems:Bosch 3rd GenerationShimano E-STEP 7000Shimano E-STEP 8000BroseYamahaFeatures: Material: 7075 T6 Aluminium Use: Electric Bike (E-bike) Speed: Single speed Size: 104mm PCD Bolt Pattern: 4-bolt 100% Designed and Made in FranceManufacturer's Part Numbers: CRP138 Black 38T CRP140 Black 40T CRP142 Black 42TBuy TA Components from Chain Reaction Cycles, the World's Largest Online Bike Store.