For the 7 years I've had my disc cover, if I'm wearing the race wheels (old 808s) then I'm wearing the disc cover. Only exception was Kona. Racing only though - almost never run those wheels for training. Its attached with 4 of the 8 fasteners, with the other 4 holes covered with a small piece of electrical tape. Plus some elec tape at three spots helping the cover stay tight to the wheel rim (three spots that avoid covering the zipp decals).
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