e*thirteen Helix Race Alloy e*spec Crank Arm Set - BOSCH SX-Brose S Mag-TQ HPR50, 21.5mm Offset, 165mm, with Self Extractor, Black Rim Brakes All other castle tools are

All other castle tools are replaced by this new Super Castle

Manufacturer Part Number: ECHO-RED-BLK

177383-Q0-L

Manufacturer Part Number: M178-01-AG

- 68mm road/73mm mountain) to accept most 24mm or 24/22mm spindle cranks

e*thirteen Helix Race Alloy e*spec Crank Arm Set - BOSCH SX-Brose S Mag-TQ HPR50, 21.5mm Offset, 165mm, with Self Extractor, Black Rim Brakes All other castle tools areA high performance, weight optimized alternative to carbon fiber, for riders who prefer alloy cranks. These 24mm ISIS interface cranks are engineered for compatibility with Bosch Gen 4, Brose S Mag, TQ HPR 50, Fazua, Yamaha, Maxon, and Specialized Brose motor systems. They come in short lengths starting at 155mm for improved pedal clearance and are tested to E Enduro standards. Product Specifics Color: Black Crank Length (mm): 165 Pedal Spindle: 9 16"