Profile BMX Universal Spline Drive Sprocket Adapter These Profile BMX sprocket adapters are designed to be used with the Profile Sabre sprockets and Profile Signet guard sprockets. The adapters are made from 4140 chromoly and push firmly into the sprocket. These Profile spline drive adapters are a proprietary system that has been developed by Profile Racing and they only work with specific Profile sprockets. These Profile sprocket adapters are specifically for use with either 19mm or 22mm splined sprockets. If you are looking for the Profile Bolt On sprocket adapter click here. How to fit a Profile Universal sprocket adapter? This video has been made by Profile Racing and shows how to both insert and remove a Profile Universal sprocket adapter. .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }