I would like to run a larger tire on the rear of my 07 RSTD. I'm not trying to do anything performance wise with it, just better appearance from the rear and hopefully will track better with road grooves. My last VTX ran a stock 180 and many would run 200's which are Metz 880 and approved by Metz on a 5.5" wide wheel. I think I read that our wheels are 4.5" wide. Does anybody have experience running a 160-180 without modifications?