Profile Spline Drive - 19mm supplier_40979357827183 A wide interior center channel

A wide interior center channel and ramped inner walls make for easier tire installation and lock the tire bead securely under the sidewall lip

Material: die-cast alloy construction

Made from tougn nylon with cromo insert

36 hole only

Built from 6061 aluminium for strength and durability

Profile Spline Drive - 19mm supplier_40979357827183 A wide interior center channelRequires 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. ###section### Product Specs TYPE: Spline Drive MATERIAL: Alloy WEIGHT: 76g 2. 65oz