19mm traditional is our standard bore size. If you need a different size please select from the available options. If choosing "custom" you will need to specify the bore diameter in the order comments.
Universal Spline Drive
19mm Traditional Mount
22mm Traditional Mount
15/16" Traditional Mount
Custom (Specify size in order comments)
*Spline drive insert is not included. Follow link to purchase.*
Profile Universal SD Adapter | Powers Bike Shop (powersbmx.com)