THIS SPORT CHANGES PRETTY MUCH EVERYDAY. PROFILE IS AT THE FOREFRONT MOST OF THE TIME ALSO. HERE THEY OFFER A 8,9,10 or 11 TOOTH DRIVERS FOR THEIR EVER SO POPULAR SS AND MINI CASSETTE HUBS. THE DRIVERS ARE MADE OF TITANIUM OR CHROMOLY. JUST REMOVE THE OLD DRIVER OUT OF YOUR HUB AND SWITCH THE PAWLS OVER TO THIS BABY AND REINSTALL. YOU ARE SET TO JET. DRIVER INCLUDES DRIVER BEARINGS ALSO.