1969 Spare tire and wheel
ok...I'm trying to set up a spare that will work with my 69...
Back tires are 255/60/r15 BFG radial Ta..not sure of rim width...POSI rear
Front tires...155/80/r15 BFG radial Ta's...15x5 rim
If I get a flat I need to keep the diameter the same for the rear so as not to ruin the Posi gears. Rear tires are 27.1 diameter from BFG specs
I want a tire to fit the front as well if used as a spare so a large 255/60/r15 will be silly and take up a lot of trunk space.
I searched tire specs and the 215/70/r15 BFG is 26.9 diameter which comes out to 5 revolutions difference per mile. (i'm not rainman, just researched)...
My question....a 15x7 rally rim with WHAT backspacing will work? Disc brakes all around on car. Am I missing anything else here?