Profile Spline Drive BMX Sprocket
The Profile Spline Drive sprocket is CNC machined from 7075 Aluminum in the USA with the same quality Profile is famed for. It 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. Supplied with 19mm splined steel insert.