ok i know this has prob been covered a MILLION times but i cant seem to find the answers im looking for with the search or the FAQ section...so here goes... im in the market for new rims im looking at 15x8 welds....my car is a soon to be 383 with a single 70mm turbo suspension mods are minimal....slp subframes and sportlines...the question is whats the biggest tire i can go in the rear with a 15 inch rim??? i know with a 16 inch rim i can safely go 255/50/16..... but since i am going to a 15 inch imm unsure of what will fit now... id really like to squeeze on a P275/60R15 but i dont know if i can get it on there....minor hammerring and grinding of the bumpstop would bother me at all ...thanks guys

 

What kind of tire are you looking for? ....street? .... drag radial? ....track slick?

What diameter are you looking for? That will be determined by HP level, how hard it launches, rear axle ratio, etc.

Why are you limiting your wheel selection to 8.0" wide?

Here are the links to the Mickey Thompson, BFG and Nitto drag radial tire size charts, with recommended wheel width for each tire:

http://www.mickeythompsontires.com/strip.php

http://www.bfgoodrichtires.com/bfg/productIdSubmit.do

http://www.nittotire.com/#index%2Etire%2Ent555r%2Esizes

 

im not limiting to a 15x8 i woild just like to biggest tire i can go with (largest dia.) the car has 410 gears and wll prob b somewhere around 600rwhp.....the tire i looking in to will b a MT drag radial

 

i do want to stay w a 15 inch rim though

 

I run a 275/60/15 MT drag radial, 28" diameter

 

what with rim? and what clearance issues did u have??.....i hope the sportlines wont hold me from putting a 28 inch dia on.......

 

I used a 15x8 weld prostar wheel, with 5.5" backspace. No clearance issues at all.

 

If you look at the M/T size chart for the MT Drag Radial, it shows that the 275/60-15 will work on a wheel width of 7.5" - 9.5". The show the "measured" width as 8.0", so that is the wheel the tire was designed to fit on.

The sidewall width is 11.0", so it isn't as big a problem at the 28x10.5-15W ET Drags (13.1") that I run on a stock height car. But with a 2" drop on the Sportlines, its going to be very close to the outside lip of the fender DEPENDING ON THE BACKSPACE. You have to get a 5.5" backspace on the 8.0" wide Welds to get the tire just under the edge of the fender. As far as I know, thats the largest backspace they make in a 8.0" wide wheel, but if you could find a 6.5" backspace, it would move the tire away from the fender lip, deeper into the wheel well.

This is where the outside edge of the tire will be with a 5.5" BS on an 8.0" wide wheel:



Somehow, lowering a car 2" doesn't seem consistant with drag racing it.

 

yea i know lowering the car doesnt make much sense lol... but it has been lowered for almost ten years now the suspension iis getting done in the near future just not at the moment ...thank you for your help im going to see if the jegs knock offs come in the correct backspacing..... if not ill stick with the welds...thank you again for your help