245/60/15's on 15X8 rims
I have yet to hear a 15 X 7 inch wheel will not fit in the rear with correct off set... and i know that 255 60 15 tires fit ....
Of course a 15x7 will fit with the right backspacing. Not arguing that at all. What tire will fit is a different story.
As far as what you know about 255's, you know they fit
your car. And a few others no doubt, there's a few in this thread. But that doesn't mean they'll fit every car, because they're not all the same. Here's some folks that have encountered cars that either couldn't fit 255's, or had to trim the quarter lip to do it. On 15x7's too.
My old setup on my '69 was 255/60-15 on back. Fit like a glove on my car. My buddy tried them on his '69 and they wouldn't fit. Not even close. I'm not sure how some guys are getting 275s on their car but it seems to work for them so...
I am running 255/60R15's on 7" steelies with 4.5" backspacing. Driver's side fit perfectly...passengers side rubs a little bit so I had to trim about 1/8" off the inner fender lip. Fronts are 205/65R15 on 6" steelies
On my Dart, I was able to fit a 245/60/15 on a 15x7 with a 4 1/4 inch back space. 1969 Dart.8 3/4 rear. I can just fit a finger between the tire and the leaf spring. And between the tire and the fender.
On the white car in my avatar, I had 245/60R-15 on 7" rims and I was 1/8" clearance on the quarters. I had used Moser axles when I switched over to the 5x4.5 lug pattern.
Thanks for all the Help guys! I got my wheels and tires on and it looks great. I had to shave 1/2" of my inner fender lip and put ESPO +2 springs on and I have plenty of clearance!
For anyone else having the issues I was see below for sizes.
rear- 15x8"mopar cop wheels with 4.5" BS wrapped with a 255x60x15 BFG
Front 15x7"Mopar cop wheels with 4.25"BS wrapped with a 215x65x15 BFG
Bought my wheels from Summit Racing because they had these sizes in stock.
These are all from this one thread
1969 dart wheel and tire size?
1/8" clearance to the quarter won't work, it WILL rub eventually. One finger width isn't enough either, unless someone's got a 1/2" thick finger. And then there's the "fits on one side, rubs on the other" issue. These cars are not all the same, not even from one side to the other. Axle housings are sometimes offset by a 1/4", wheel wells/quarters can be off by as much as a 1/2", even side to side.
The rims I'm looking ( 15X7 ) at have a 4.25 backspacing
Like I said earlier, that's not enough. 5" to the quarter, 6" to the springs. A 15x7" rim is 8" wide outside lip to outside lip. A 255/60/15 has a section width of 10.2", a 245 is 9.8". So that means you have 1.1" of tire overhang with a 255, and .9" with a 245.
4.25" of backspace means 3.75" of front space. So, 3.75 +1.1" is 4.85". That means you'd have .15" of clearance to the quarter, and that's not nearly enough. It would also mean you have .65" to the springs, which is plenty. Even if you assume the 255's section is squeezed down on a 15x7" and call it 1" of overhang you still don't have enough room. Even with a 245 you'd probably not get away with the 4.25" of backspace, it might clear most of the time but if you did any kind of serious driving or loaded up the trunk or back seat I bet it would rub.
What you want, if you want to run 255's, is a 15x7" with 4.5" of backspace. That's the ticket on your car with BBP axles and brakes. Even for a 245 that would be what you really wanted for backspace.