Profile Racing Universal SD Adapter style:E 24mm bolt on Ergonomically pre-shaped knee generously contoured

Ergonomically pre-shaped knee generously contoured to accommodate most types of knee braces and guards

They are designed to be used with 3/32" chains and fit Onyx Ultra compatible freehub bodies

OS2O is 451mm wheel diameter in similar widths as 406mm wheels

AND RIM(S)

2 axle positioning options to allow use of full dropout range

Profile Racing Universal SD Adapter style:E 24mm bolt on Ergonomically pre-shaped knee generously contouredProduct Description UNIVERSAL SPLINE DRIVE ADAPTER These sprocket Inserts are proprietary to the Profile Sabre sprocket and Madera Signet Guard. Made from 4140 chromoly. Available to adapt your Sabre or Madera Signet Guard sprockets to either: A. 19mm Spline Drive B. 22mm Spline Drive C. 19mm Bolt On D. 22mm Bolt On E. 24mm Bolt On