Wheel question

[grandkodiak]

I haev a 1996 Trans Am with the stock 16" wheels. I want to go with 17x9.5 front 17x11 rear in a black Z06 replicas... now the ones I found say

"They are 5-lug (5x120.65mm). The 17" x 9.5" are a +38mm offset (6.7 inch backspacing) and the 17" x 11" are a +36.5 mm offset (7.397 inch backspacing)."

And I was told it will fit without modification to my car, but I was also told I do not want to mount them and to find ones of another group of specs. I was told to get these specs:

"+56mm offset with 7.4" backspacing"



But if the first ones fit, why wouldnt I want to use them? Are they structuarally dangerous? I dont know much about fitting wheels, any help would be appreaciated!

[jims69camaro]

the thing is, this has become a science. it used to be that tires and wheels were skinny enough to fit inside the wheelwells and if they were a little too fat, you just rolled the wheelwell lip so they didn't rub.

now, however, if you don't get the backspacing and size right, you will rub on the inside or rub when the wheels are turned to lock or when going over a speedbump, or... you get the idea. i would say find out what the specs are for your current set of wheels and then follow that as closely as you can. or, find someone that has your wheels and your car and find out what his specs are. there are a ton of people out there that have certain combinations, you only have to locate one of them.

the other thing you can do is find an educated tech who knows wheel fitting and how to jam the most rubber into the wheelwell without rubbing. i started a project a while back about who had what custom wheel/tire application on their car to make it easier for someone who wanted to upgrade - all they had to do was look at the grid and see if the proposed wheel/tire combination would work. unfortunately, that information is on my other computer - the one on the floor behind me. i will get that info out eventually, but i don't think it will be in time to help you.

[slugger27nj]

The following link should be very helpful to you:

http://www.ls1tech.com/forums/showthread.php?t=120716

[grandkodiak]

Goin by that chart, the wheels I found tonight that are:

Rear wheels 17 x 11 50mm
Front wheels 17 x 9.5 56mm

Should fit perfect, no?

[ar0ck]

Yeah should fit pretty good. Just a heads up but I see online that it is hit or miss when it comes to banging the inner fenders for 315's. Other wise good luck and they should look good!

[Tru2Chevy]

They are 5-lug (5x120.65mm).

To others with some experience - isn't this the size that fits on a 5 x 4.75" BP, but not quite right?

- Justin