I order this freehub because I was told that it would work for my AR41 wheel with Campy super record 11s. It turns out that the cassette does not fit, it can only fit 9 cogs! When I emailed the rep, I was told that it was the right freehub and it should've worked. He then offered me a link to order an adapter for the freehub. I was rather disappointed to hear that this was the solution! i didn't want to spend more money on an adapter that didn't look like it would work and risk of wasting more money. Why doesn't Reynolds/Hayes provide parts for their wheels regardless of being rim brake or not they should have parts available customers that buy their products. I've been a long time customer of Reynolds wheels and Hayes for parts. I am now looking into finding a new branded set of wheels because I can't seem to order a simple and common part for my Reynolds wheels! Unfortunately, I probably would no longer recommend Reynolds brand to my circle of riding friends.