e*thirteen Helix e*spec Crank Arm Set - 165mm BOSCH Gen4-Brose S Mag-TQ HPR50 Self Extractor BLK MFPN=ZS56L-40-BLU Direct mount forged then CNC

Direct mount forged then CNC machined 7075-T6 aluminum chainring

Color Black w/Yellow Label Defined Color Black Flat Protection Tread and Sidewall ISO Diameter 622 / Road / 29" ISO Width (mm) 55 Labeled Size 29 x 2

PowerLock chain connector features Flowlink technology to provide superior chain-guiding and increased longevity

Spoke Interface J-Bend Skewer Included No Defined Color Black Rear Axle 12mm Thru x 148mm Color Black/Red Hub Drilling 32 Bearing Type Sealed Cartridge Hub/Brake Compatibility Center-Lock Disc Cassette Body Type SRAM XD 11/12 Speed

e*thirteen Helix e*spec Crank Arm Set - 165mm BOSCH Gen4-Brose S Mag-TQ HPR50 Self Extractor BLK MFPN=ZS56L-40-BLU Direct mount forged then CNCe*thirteen Helix e*spec Crank Arm Set 165mm BOSCH Gen4 Brose S Mag TQ HPR50 with Self Extractor Black. Helix Core cranks provide an e bike drivetrain upgrade with high end features and aesthetics at an exceptional value. Forged for e Enduro strength with alloy self extractor bolts pedal washers and molded impact boots. 24mm ISIS interface models are compatible with Bosch Gen 4 Brose S Mag TQ Fazua Yamaha Maxon and Specialized Brose motor systems.