i am trying to 15x7 in rims on my 66 mustang. i got these wheels for free. they have 4 1/2 in backspacing. i plan on using 186/65/15 on the front of my stang, but i was wondering what size tire i can run in the rear. i would like to fit the biggest sise tire withiut having to modify the wheelwells. Can i fit a 225/60/15 or will i need to run less backspacing? what about 215/60/15? where can i find wheel spacers if i need them? any help is greatly apreciated.

 

Look at Dodgestangs wheel and tire chart up on top of this forum.

 

15x7 4.5 backspacing will hit the ball joint in the front.

IIRC the most backspacing you can run on a 7 wide wheel is 4.25 so you would need a .25 spacer available at most stores. I would run 215 60 15 on all 4 corners.