67 GTX
Well-Known Member
Hello All,
I am having rear tire fitment issues on a 67 GTX (no surprise there). Currently on the car are rims with a 4 1/8 backspacing, and 235 70R15 tires. The old leaf springs were shot and air shocks were used to raise the rear.
The leaf springs were just replaced with new ones that gave a 1 inch lift over stock, and new normal shocks were also installed. The car sits a bit lowered than preferred, and there are still tire clearance issues with the wheel well.
I know another option is to use hangers and/or shackles that have different bolt hole locations to raise the rear, but I am trying to avoid those for now.
A 235 70R15 tire is 28” tall, and 9.5” wide.
A 225 70R15 tire is 27.4” tall, and 9” wide.
The car currently has 15x7 rims that have a 4.125” backspacing (Cragar S/S).
Is my following thinking correct: Going from the 235 70R15 to a 225 70R15 tire will buy me .25” of clearance from the side wheel well, and .3” of height in the wheel well?
Has anyone run that (4.125 backspacing on a 15x7 wheel with 225 70R15 tires) and leaf springs in the stock location (with no lift or a 1” lift)?
I am having rear tire fitment issues on a 67 GTX (no surprise there). Currently on the car are rims with a 4 1/8 backspacing, and 235 70R15 tires. The old leaf springs were shot and air shocks were used to raise the rear.
The leaf springs were just replaced with new ones that gave a 1 inch lift over stock, and new normal shocks were also installed. The car sits a bit lowered than preferred, and there are still tire clearance issues with the wheel well.
I know another option is to use hangers and/or shackles that have different bolt hole locations to raise the rear, but I am trying to avoid those for now.
A 235 70R15 tire is 28” tall, and 9.5” wide.
A 225 70R15 tire is 27.4” tall, and 9” wide.
The car currently has 15x7 rims that have a 4.125” backspacing (Cragar S/S).
Is my following thinking correct: Going from the 235 70R15 to a 225 70R15 tire will buy me .25” of clearance from the side wheel well, and .3” of height in the wheel well?
Has anyone run that (4.125 backspacing on a 15x7 wheel with 225 70R15 tires) and leaf springs in the stock location (with no lift or a 1” lift)?