This kit offers a few options to purchase a replacement freehub:
-Select the Shimano 8/9/10 speed freehub if you have a Shimano 8/9/10 speed road series cassette, and simply want to replace your existing freehub with a new one.
-Select the Shimano 11 speed freehub if you have a Shimano Road 11 speed cassette, and want to replace the existing freehub with a new one. Or, if you want to convert your existing Pure R241 from 10 speed freehub to an 11 speed cassette/drivetrain, select this kit. The kit includes the 11 speed freehub and end caps to convert their existing 10 speed R241 hub to 11 speed.
-Select the Campagnolo 9/10/11 speed freehub option if you have a Campagnolo cassette/drivetrain.
Note: This conversion kit only works with the R241 hubs, and does NOT work with the following hub series, R200, RT300, RT320.