I just bought some 1.25" at the Daytona Sping show last month and installed them. Looks good, but I'm finding they rub whenever I go over bumps. This weekend I had the car loaded going to the Mustangs and Mustangs show here in Florida, and scraped over every bump on the highway it seemed. Don't like the idea of my fenders now being the bump stops and tearing up the edge of my tires.
I didn't need to shave anything with the 1.25" but the tires are being shaved now

What width will work best and still clear the fenders? I have Steeda Springs and Tokicos and want to keep my stock wheels. I'm only looking at doing the rear ones to get a wider looking stance and fill in that gap.
Also, will doing just the rear effect the alignment and wear characteristics, and can an alignment still be done at the local tire shop?