firebird518

Hello y'all I'm Shane I have a 86 firebird stripped I'm in the process of installing a 454 and a th 400 tranny I have a stock width rear end with 4.10 gears I'm looking for a good drag race wheel width back spacing and tire size. I've searched with not much luck of understanding back spacing I'm looking to run a D.O.T slick due to our local track doesn't allow full slick on test and tune night . This car will drag race only looking to run a 15" wheel Thank you in advance

heavy_chevy29

most (including myself) that run a 15 inch wheel run a 5.5 backspacing and a 28X10.5 slick or what ever that is in radial form. i cant believe your local track has any issues with tires on a tnt night. around here they break ***** about sound level(mufflered or not). good luck

firebird518

Thanks man they bust chops on mufflers here too

heavy_chevy29

thats on a 15X10 wheel

heavy_chevy29

cant believe they would say anything about tires. most tracks would be happy to have the business these days

AlkyIROC

15x10 rim with 5.5" of backspace is the most common choice. A 9x28 slick has no problems. Going to a 10.5x28 slick should work but may need some slight fender modifications.

You'll have to figure out what a DOT tire that you intend to use. The sidewall width is wider in relation to a full slick. Slick width is measured across the tread. A DOT tire is measured across the section. A 10.5 slick may be close to 12" with a DOT tire. A 10.5 DOT tire normally has around 8.5" of tread.

Going taller than 28" needs inner fender modification especially around the front radius of the wheelwell. With only 4.10 gears, 28" tall is more than enough.

Only allowing a DOT tire on TNT is BS. The only difference between an ET drag and an ET Street is the tiny groove marks in the tread to call it a DOT tire. It still isn't recommended to use the ET Street on the street.

project89

iTrader: (1)

i thought everyone ran a 15x10 with 6.5 bs not 5.5

83 Crossfire TA

iTrader: (2)

6" is actually perfect, but hard to find, so people tend to choose 5.5" and let them stick out a little or 6.5" and hammer/cut the insides of the wheelwell up till they fit. Personally, I went with 15x9 and 5.5" which puts the wheel at the same offset as a 6" BS with a 10" wheel.

articwhiteZ

iTrader: (56)

you can bolt on a15x 8.5 rim w/4.5 bs with a 28x12.5x15 and get a full foot print running 15psi. no mods needed.

28x12.5x15 15x8.5 w/4.5 bs


the big step is going 15 x 10.275wide rim w/6.5 back space.
LCAs need to be moved in 1"
inner fender needs to be moved back 2"
bump stops need to be removed.
more dep on tire size.
running a 29x13.5x15 is as big as i can go on my car. the g/fx get in the way to go taller.29x13x15 MT Sportsmen pro shown


91/92 camaros..older could be diff..

Skplugg11

Can anybody help me out with these questions I have a 1987 Z28 that I bought a set of drag-thrust for the rear wheels are 15x8 with 5.5 back spacing and the front are 15x4 with a 1 3/4 back spacing the camaro came with a 1" drop springs on it I'm looking at a 275 60 15 tire for the rear and was trying to find out if this tire will fit well with the rim and 1" drop and what would be a good size tire for the 15x4 up front. The car has both 1" drop springs if front and rear. Thank you for your time

RedLeader289

iTrader: (2)

I had 15x4's in the front, with 1.75" backspacing and I wrapped 165R15's on them and they worked well.

You may have issues with the drop though and trying to fit a 275 60 R15. If you remove the drop they'll fit just fine (that's what size I have).

FRMULA88

15 x 8 with 5.5 BS using 28x10.5 slick

This is the narrowest wheel you can run with a 10" slick

Skplugg11

. Hey thanks for the info I have order both front and rear tires today thanks again.

Skplugg11

Just wanted to say thanks for the help I have order my tires for my Z28