Specification AgeRangeDescription : Adult BicycleGearShifterType : twist_grip BikeType : Electric Bike BrakeStyle : Disc Brand : SHIMANO BulletPoint1 : Alfine single sprocket with built in chain guide BulletPoint2 : Nickel plated for excellent durability BulletPoint3 : 20T BulletPoint4 : The Right is the drive side and the Left is the non-drive side The left side pedal is reverse threaded so you tighten it backwards (counterclockwise).Drive side is normal, clockwise to install it BulletPoint5 : Notice: Please check the interface of your original crank arm is diamond hole,this is only right crank Color : silber (20 Zähne) Department : unisex Department1 : mens Department2 : mens ExternallyAssignedProductIdentifier1 : 4524667134374 ExternallyAssignedProductIdentifier2 : 04524667134374 GpsrSafetyAttestation : 1 ImportDesignation : Imported ItemDisplayDimensions_Height : 3 centimeters ItemDisplayDimensions_Length : 13 centimeters ItemDisplayDimensions_Width : 13 centimeters ItemDisplayWeight : 0.1 kilograms ItemName : SHIMANO Spare Part Alfine Sprocket 20T ItemPackageDimensions_Height : 14.9 centimeters ItemPackageDimensions_Length : 2.5 centimeters ItemPackageDimensions_Width : 12.1 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : bike-cranksets-and-accessories Manufacturer : Madison Material : Others ModelName : 2093097500 ModelNumber : CSS50020 PackageLevel : unit PartNumber : CSS50020 Pattern : Solid PowerSourceType : Electric motor ProductDescription : Alfine single sprocket with built in chain guide. Nickel plated for excellent durability. 20T. ProductSiteLaunchDate : 2012-09-06T14:36:16.801Z Size : 20 teeth Style : 2093097500 SupplierDeclaredDgHzRegulation : not_applicable SuspensionType : Rigid TargetGender : unisex UnitCount : 1 UnspscCode : 53000000