e*thirteen Helix e*spec Crank Arm Set - 165mm BOSCH Gen4-Brose S Mag-TQ HPR50 Self Extractor BLK MFPN=ZS56L-40-BLU Cassette Body Type Single Cog

Cassette Body Type Single Cog Driver Color Hard Black Defined Color Black Hub/Brake Compatibility Rim Brake ISO Diameter 406 / 20" BMX Rear Axle 14mm Threaded x 110mm Rim Width (Internal) 32 Tire Type Clincher Valve Schrader Wheel Size 20"

Wolf Tooth Precision Headsets for Trek Knock Block are machined in the USA out of aircraft grade aluminum with superior sealing for protection against the elements

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 Cassette Body Type Single Coge*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.