I have a 88 IROC-z with 15 inch rims in the back. I was thinking of putting drag radials for the back. But I not sure its going to fit the tires are BFG's the size they have is P275/50R15 or P275/60R15 I was wondering if any of these tires would fit. This is with the stock application. One more question do you know if you can fit 4th generation tires on a third gen car. Thanks

 

No 4th gen came with a 15" wheel so the answer is no. The actual tires size (overall height and width) is similar except for the fact that the inner part is tailored to a larger wheel. However, with spacers you can run 4th gens wheels.

 

you can run 275/60's on stocker wheels, look in my sig, that what i have on my back wheels. i, however, would recommend going to an 8" wide rear wheel to run these things as the side wall has a lot of slop in them and they will not handle well at all. the 275/50's are 2" in diameter shorter than the 275/60's and i don't imagine the sidewall being able to go to the 7" rim very easily.

 

Iam only running 255's at the rear and iam having some clearance issues

 

Thanks mw66nova, so you use the same tire size and BFG drag radials? I thought that the width of a 15" was 8.5" not sure. Thanks. 255/60 works on my camaro right know and it clears it shouldn't be a problem.

 

the stock 15" wheels are 7" wide. i am running some of the new m/t et street radials on them. they are 275/60/15's.

 

Thanks i'll go with those. shoots

 

MMMMMM E/T radials

 

mmmmm....i like them alot!

 

Wow you are packing some serious meat back there!

 

275-60-15 are too tall and too wide for a thirdgen (you can run a wider wheel, but not a tall tire like that).

They do have a 235-60-15, which may not be as wide, but would work a lot better.

 

the 275/60's are working great on my car...i need the height of the tire to help with ground clearance from the dual exhaust, and the roll-out of the taller tire is better with the 4.10 rearend i have under the car for drag racing....which i do quite a bit of.

 

I thought you could use a 4thgen wheel but the offset was wrong?

I remember reading somewhere that you were good to go with a set of spacers.

I KNOW I've seen them on many cars here. Along with C-5 wheels too.