I am about to purchase the Cutlass Supreme I have been eyeing. I was curious what you guys thought about my tire and wheel selection, as I have never purchased aftermarket wheels nor tires before.
I was planning on running BF Goodrich Radial T/As, 245/60SR15 on Jeg's Cragar D Window Knockoffs, at 15X8 inches with the 5 X 4.75 bolt pattern and 3.75" backspacing. Do these sound like a decent/legitimate fitting/looks/handling setup?

 

That doesn't sound like enough backspacing to me, but I'm no expert. I would think 15x8 would need more like 4.5" backspacing.


Mike

 

Here's a recent discussion on your question:


https://classicoldsmobile.com/forums...7-cutlass.html

 

Thanks. I actually read through that discussion and still am kind of at a loss for what I need to make a wheel and tire combination fit. It seems like having ~4 inches difference between the wheel offset and width should work. Would fitment issues be more of a concern due to the width of the wheel/tire combination, or more of a height concern with the choices I had?

 

Outside of custom made wheels, there are general offset availabilities for ea wheel width. The wheel widths generally available are 6, 7, 8, 8.5, and 10. In most cases an 8 or 8.5 is what will fit under a stock height 67 with p275-60-15 or smaller without issues. 10's may rub on the outside of the tire to wheel lip on the fender.

 

Thank you Eric. So it sounds like the wheels are a solid choice, but I may want to verify my height on the tires?

 

I think 245/60 is a bit short. The car came with about 27 inch tall tires. I bought 255/60 that are 27.1"
Tim

 

I run a 27.99" tire in the rear and I would recommend either a P275-60-15 or a P225-70-15. For the front, if the car is stock height, P225-60-15 (25.63), P215-70-15 (26.85) or little less.


This is a good calculator for tire sizes:


http://www.discounttire.com/dtcs/infoTireMath.dos

 

I've got 245-60R15 BFG's on my '67 442 convertible all the way around. They are on Wheel Vintques 15X8 SS1 wheels. They rub just a little when I hit a bump while turning a corner.

 

Thank you very much. I am very excited to be one step closer to putting the Cutlass on the road.

 

I think I may go with 225/60R15 tires on all four corners to keep the same characteristics on each corner, without fitment issues and the ability to obtain a higher speed rated tire for the street.

 

The 225-60-15 may be a bit short in the rear. My discount tire shop here in town will let me test fit tires/wheels before I buy them, maybe your tire shop will do the same.

 

I figured they would be shorter in the rear as well if they were a good size for the front. I eventually plan to lower the car some to a more "touring" set-up, so eventually the wheelwell gap will be smaller. I guess the wheel and tire combo in rear should make my speedometer a bit slow, but that should be fine. Is there any additional stresses or wear which may occur from running a slightly smaller overall size combination on the drive axle?