Quote: If 11.5s are an inch under stock (which I think they are), I wouldn't go any lower than that. I have a set of Progressives that are an inch under and a new back tire rubs the fender just slightly over hard bumps. It's not enough to go back to stock but I'd hate to see what 10.5s would do. It also might be the Progressives and the amount of travel they have. I haven't heard of anyone else rubbing the fender, so it might be my shocks.
you should be able to do a little searching on here and find some more info on what people are running and how they look.
Don't forget the bike will handle differently.
Good luck and nice start.
I have progressives, 10.5" as well as 2" lowering kit in front - no problems.