Dual-spline universal lockring for Centre-lock hubs
For 12 mm or Q/R hubs use the inner spline with a standard HG cassette tool
For 15 mm MTB front hubs use the outer 'BB' style spline
Low profile outer spline for tight clearance forks and frames such as those found on some aero road designs
Whilst not essential, we advise that you use an aluminium tool such as the Park BBT-69.2 to prevent unsightly marking to the ring's splines on installation
Always use a torque wrench set to 40 NM when installing