i have a 70 cutlass s and right now i have bf goodrich 275/50/15 mounted on a 15X10 inch rim. i still have more room to put a bigger tire on and need help in decideing what ti get. right now my tire measures 25inch talll and about 11-12 inch wide.

i am looking at 325/50R15 Nitto NT555R Tire 180-810 325/50/15 and woud like to know if they would fit on my car with any rubbing problems. will post pics of bf goodrich tire soon. thanks, josh

 

tire

 

Hi Josh
Back in the 1980's I ran a set of 295/50/15's on 15X10 wheels on the rear of my 1971 Cutlass Supreme. The wheelwells looked plenty large enough, and going straight down the road was no problem. But what was a problem was body roll. A hard corner would cause the inside of the tire to rub and more noticable was going into a parking lot in town. Where the sidewalk is sloped as a ramp to get into a business parking lot. It would always rub when I drove across one of these. So I'd encourage you to keep the 275's and not go wider. If you really want to go wider then consider the backspacing of the wheel, mine were made with the center at the center of the outer rim. John

 

the center of my rim is not flush witht he outside of the tire. the new nitto tire would be 13 inch wide and 28 inch tall. i have the reg. shocks in it now but i do have air shocks too

 

Personally, I think a 25" tire looks lost in the A-body wheelwells. I'd use a 27" diameter tire. The BFG 295/50-15s fit nicely if you get the correct backspacing on the wheels. Much wider than that will require careful wheel selection and possibly rolling the fender lip.

 

im only 17 years old, can someone explain what exactly backspacing means for the tire? could i go measure it real quick or what?

 

so you think that mea trying to run a 325/50/15 will definatley rub?

 

Check this out. Should answer any questions on backspacing (among others)

https://www.rsracing.com/tech-wheel.html

-Jeff