e*thirteen Helix e*spec Crank Arm Set - 165mm BOSCH Gen4-Brose S Mag-TQ HPR50 Self Extractor BLK MFPN=ZS56L-40-BLU Finish Line's Showroom Polish &

Finish Line's Showroom Polish & Protectant with Ceramic Technnology  delivers maximum luster repels water and prevents grime buildup

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

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

e*thirteen Helix e*spec Crank Arm Set - 165mm BOSCH Gen4-Brose S Mag-TQ HPR50 Self Extractor BLK MFPN=ZS56L-40-BLU Finish Line's Showroom Polish &e*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.