I just bought a new Renn 575 disc wheel for my 2009 Leader 735TT. The freehub from Renn is Campagnolo. Last year I rode this bike with a DA group and plastic wheel cover over a regular spoked wheel. I swapped the components to Campagnolo. When I mount the new Renn wheel on the bike and close the quick-release lever the edge of the cassette binds on the dropout. I guess I'll try a washer between the cassette and dropout.