This is a quote from an experienced forum member.
"If he chain is going straight back, totally parallel with the bike frame and direction of travel then the rear sprocket and chain should end up not too near the stays even in a fairly curvy frame.
So you still need to measure the spacing of your frame's dropouts and then the gap between the left side dropout and the rotor mount.
It seems likely that you will need the top hat shape which mzmiami dot wherever definitely sell, but you have to measure bike to know. I have not looked for it because it isn't what I need."