Tire Advice for 78 Big 10 with 15” Rally Wheels
 

The time has come. I need new tires as the current ones, which are probably 30 years old, are worn.

I currently have the stock 235/75 R15s on for all four tires. I am wondering if I should go a smidge taller on the back to jack the back end up a little. I don’t want to mod anything or swap rims.

Any good options out there? I am going to go with white lettering.

Re: Tire Advice for 78 Big 10 with 15” Rally Wheels
 

255-70 rear and 245-60 front on 15x8 rally

Re: Tire Advice for 78 Big 10 with 15” Rally Wheels
 

I can't tell from the pics -- is that 2wd or 4wd? If 4wd, don't mismatch the front and rear tires. Even for a 2wd, I don't like the look of mismatched tire sizes.

The rear is easy to lift. Buy a set of longer u-bolts, and install a two-inch block between the axle and the spring. https://www.offroaddesign.com/suspen...ft-blocks.html

Re: Tire Advice for 78 Big 10 with 15” Rally Wheels
 

My burb has 255/70 all the way around on factory 8” wheels. They fill out nicely.

Re: Tire Advice for 78 Big 10 with 15” Rally Wheels
 

Another issue with mismatched sizes is what size do you pick for the spare? If you have a road size tire issue, you could wind up with two different sizes on the rear. Not good, especially if you have some kind of limited slip differential.

Re: Tire Advice for 78 Big 10 with 15” Rally Wheels
 

Utilize a spare that's the same size as the rear tires.

Re: Tire Advice for 78 Big 10 with 15” Rally Wheels
 

That's all I did . You just have match the height...But then I never had a flat.