it is bolted to a trailer just from memory I'm gonna guess and say about 1/2 to 3/4 of an inch I do remember it being fairly close
Yeah, that's a little too close for comfort for me as far as clearance for the chrome rotor covers goes. Any jostling around of the bike with those close tolerances and I think some damage could possibly occur. You have two of them as I recall. The one that you are referring to is the one that is identical to mine, right? I think I'm just going to play it save and get the one like Tucci, UDawg & your other one ( like theirs) just to be on the safe side. They have no complaints with theirs and I should be good to go.