I have a 18" rear wheel with a 150/70 Metzler. When I run my 1" lowering blocks and lower air pressure in my 13" Ultra Classic stock shocks I will some times bottom out to where my tire rubs the inside of my rear fender. What I'm wondering is if I would run the 12" shocks, with the less travel they have and getting rid of the lowering blocks would the rubbing stop with the 18" wheel? Anyone have the same problem and what did you do?