Reply to "Pantera Front Tire Survey - Please Respond"

To get the ball rolling, I’ll share what I know.

A 215/60R15 tire, mounted on an OEM 15x7 wheel, having 6mm off-set, has no rubbing issues

A 225/50R15 tire, mounted on an OEM 15x7 wheel, having 6mm off-set, has no rubbing issues

A 225/50R15 tire, mounted on an OEM 15x8 wheels, having 19mm off-set, has no rubbing issues either.

A 235/40R17 tire, mounted on a Precision Proformance (?) 17x8 Campy wheel, having unknown back spacing or off-set, had no rubbing issues

However, a 245/40R17 tire mounted on the same wheel rubbed its inner edge in the inner wheel house. It had also been reported to rub badly on loaded turns, but I’m uncertain what that means.

A 245/40R17 tire mounted on a 17x9 Etoile 3 piece wheel rubbed the inner edge during full lock maneuvers. No other rubbing issues. The backspacing measured 5-3/4”, keeping in mind this 3 piece wheel had tire bead flanges which were thinner than ½ inch; the backspacing was therefore equivalent to 6.00” computed backspacing. Therefore the wheel had 25mm off-set.

A 245/35R18 tire mounted on a 18x9 HRE 3 piece wheel rubbed the inner edge during full lock maneuvers. No other rubbing issues. The wheel was specified as having 25mm off-set. The backspacing also measured 5-3/4”, keeping in mind this 3 piece wheel also had tire bead flanges thinner than ½ inch, the backspacing was therefore equivalent to 6.00” computed backspacing.

A 245/35R18 tire mounted on an aftermarket 18x8.5 3 piece wheel “rubbed just a little due to body roll in the corners”. I assume this means the outer edge of the tire was rubbing the outer fender. The owner claimed the wheel had 4.75” backspacing and “almost” zero off-set. Being a 3 piece wheel, I believe this wheel had what is equivalent to 5.00” computed backspacing and therefore 6mm off-set.