Tite size for a 15x10 with 4.5" backspace

[Greg S]

I know this has been asked but how much tire can you fit into a b body (68 GTX) rear qtr without rubbing? I wouldn't mind running a small spacer if needed. Thanks

 

[toolmanmike]

I always ran 15x8's with L60's on my B Bodies. L60-15's are about 225-60's. You can run a 255-60 on an 8" wide and it should fit without rubbing.

 

[70rrclone]

Im running a 15x10 with 5" backspace. 295/50/15. It's tight but no rubbing so far.
Theres enough variation car to car that makes it a hard question to answer.

 

[33 IMP]

I've had 10.5x28 slicks on a 15x8 1/2 rim with 4 7/8 backspace, on a 69 rr. (lips rolled, however)
Equivalent size street tire is a 295/55x 15
The wider the rim is, (10") the more perfect the backspace needs to be.
Imo, more backspace is always better than not enough, given a choice. With a bit too much backspace, a spacer can make it perfect.
A 275 60 on an 8 or 8.5 rim with 4.5 bs fits pretty easily.

 

[gkent]

69 RR ... 28 x 12.5 x 15 Mickey Thompsons. These have only 3/4" clearance to the front lip of the quarter. The car is mini-tubbed. 10" wheel with 5-1/2" backspace AND the rear has been narrowed 1/2" per side.

Key points:
28" is as tall as you can go with stock axle location and stock wheel opening.
10" wheel/tire combo will be really tight in a stock tub.

 

[Vitamin_A12]

Im running a 15x10 with 5" backspace. 295/50/15. It's tight but no rubbing so far.
Theres enough variation car to car that makes it a hard question to answer.

View attachment 1901331

Same exact width, backspacing and tire size here!

 

[gkent]

That’s bullshit! That’s a Dodge - the OP has a Plymouth. Totally different wheel openings!