Yeah I wasnt sure which one they were talking about. I'd still like to know what kinda tire hes talking about, cause theres no way on hell that a 28x11.5 slick (13"wide) is gonna fit in the stock wheelwells, but a 28x11.5 ET Street is the same size as a 275/60/15 (11" wide). If a 15x8 w/3.5" of backspace fits then for a 15x10 you would need 4.5" of backspace to keep the tire in the same spot in relation to the wheelwell, you just have 1" more width on the frontside and backside of the wheel. Go here and you can try it and see http://www.rims-n-tires.com/rt_specs.jsp