Wheel and tire sizes HELP
 

I need help in figuring out what the biggest tire I can put on my 1975 K5 with Factory suspension?? 6" or 8" wide rims and back space info please let me know what you guys are running! Thanks

Re: Wheel and tire sizes HELP
 

On stock 8" rally wheels you can run 33x12.50's with no lift with little to no rubbing. I've never tried it, but supposedly they won't rub on the street but might rub a little if you off-road it. Nice truck!

Re: Wheel and tire sizes HELP
 

I second the 33's and the stock, rally wheels (15x8). You might add a 1" lift in the back to help with the typical sagging rear end (assuming you have it). Get new u-bolts too if you add the block.

Re: Wheel and tire sizes HELP
 

What back space are those 8" wide rally's?

Re: Wheel and tire sizes HELP
 

I think it's around 4".

Here is my 2.5" lift and 33x12.5 on stock wheels.

Re: Wheel and tire sizes HELP
 

Stock height. Stock rims. 32/11.5s no rub.

Re: Wheel and tire sizes HELP
 

Just to note....the aluminum factory rims are actually 15x7 and slightly different backspacing. Also, I did ask Discount Tire to mount 33x12.5 tires on the 15x7 wheels and they told me they were unable to do it. Hence the 32x11.5 tires.

Just FYI for you. I do like the aluminum ones but opted for the Rally's.

Re: Wheel and tire sizes HELP
 

What is the actual back space on your aluminum wheels??? What is the back spacing on the factory 1974 CHEVY blazer wheels on 4x4??