max tire size

I checked in my dart, the springs sit at the same place as the wheel wells, backspace from the flange to the spring and to the wheel well were both 5 7/8." To gain any more clearance you would have to do both, I would have to move the springs and minitub it. I measured 12" exactly between my fender lip and wheel well. If you put a perfectly spaced wheel, you could stick a 275/60r15 and have 1/2" of clearance on either side. But remeber, that is real tight and it may rub if you turn a corner hard! Also, the lower the profile tire, the less deflection you will have. A 17" tire with 40 series sidewalls on a 10" rim will hardly move at all.