Where are you rubbing ? If you turn your wheel all the way to the left or right, check to see if you can see any spots that are clean, or look different than the rest of the inner fender liner. If there is a spot that is cleaner, or looks like it has been rubbed, dismount the front wheels and get ready to do a minor mod.
Once the wheel is taken off, take a heat gun to the clean spot and heat the area for approx 2-3 minutes. After it has had sufficient time to heat up take a rubber mallet, or equivalent and tap the area out. This will cause that are to form away from the wheel and tire and should take care of the rubbing issue when reversing.
**** This is for the inner fender lining only ******
GOOD LUCK
