Crankset 170mm Crank 1X System Chainwheel Single Chainring Narrow 170mm Crankset Crank feature: Material: aluminum alloy BCD:104, related holes distance: 74mm Crank length: 170mm Weight: About 658g Fit for single disc, double disc, three disc 9S 10S 11S crankset Bottom bracket feature: Model: BB91 Process: Machining Material: AL7075 aluminum alloy+PE hose Weight : About 98g diameter: 23.798mm For SH Prowheel Ixf 24mm Spindle Crankset, For 68mm 73mm Frame for Chainring feature: Shape: Round Size and Weight: 32T(39.4g)? BCD=104mm Narrow Wide tooth profiling ensures chain retention Stiff 4mm plate thickness and I-beam construction transfer loads Option information: Crank=crank+BB+ accessories Crankset 32T=crank+BB+ accessories + 32T chainring + 7075 chainring Features: Anti-skidding, waterproof, anti-rust. Suitable for most of the Made of aluminum alloy material, durable for use. Easy to install and remove.Long using for time, exquisite workmanship. Specifications: Material: aluminum alloy Color: black Spindle length:170mm Package Included: 1 set of Bike Crankset 170mm Crank 1X System Chainwheel Notes: 1. Please allow slight dimension difference due to different manual measurement. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures.