Why would you want to put the tires under the car at the rear? Conventional wisdom says that the tires should be at the outer edges of the fender wells.
DW
Because if I were to use the standard backset for the Rx7 the tires would be sticking out 4" on each side (*this would be if I were to also use the 5" tires the Mazda uses)
Because I am using a more narrow tire and high backset this keeps my rear tires very close to the body line.
I want them flush, and they are really close now....but I dont know if the high backset could be causing problems.