Requires no sprocket bolt. Instead, it has a hardened CrMo steel insert in that matches up to the 48 splines on the crank axle for pure, direct power transfer. Available for 19mm splined axles only. 1/8 tooth width for use with most freestyle/street & single speed chains.

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Product Specs

1. TYPE: Spline Drive
2. MATERIAL: Alloy
3. WEIGHT: 76g/2.65oz