ok chris and all, I am sorry for the silly question, but I am not really sure what offset means.. I am assuming offset from something, maybe the center? But does that mean a 24mm or a 40mm would be offset more outwards to get the bigger tire size? I would really like a 295 size tire out back, should I get 24mm up front with 255 and a 40mm out back with a 295? thanks for any help everyone

 

40mm should "offset" 16mm (a little over half an inch) more toward the car than 24mm.

So, the same wheels on a 40mm offset wouldn't stick out as far as on a 24mm offset, which means you can get away with wider tires without sticking out.

Of course, then you have to worry about rubbing on the inside.

Which is why I want someone else to do the experimenting for me before I buy.

 

That's why I love this forum!

 

Ok well I would be willing to give the 40mm in the back a try, I am looking for these wheels in black and the only place I can find them is on shelby's site with a 20x9 in 24mm offset. Is there another place?

Also if I can not find 40mm in black I may go with dark gray.. if said I will probably order tonight. I am thinking maybe a 285 would be ok if I go that route.. does everyone think that would be the best choice to go with out back?

*Or would I be best getting 40mm offset all around?? And if I were to get 255 and 285 size tires, what sidewall would be the best for them to be equal? Sorry for all of the questions but I dont want to spend the money to not have it work.

 

Agreed! Finally some wheels from Shelby that I like...

 

So guys, what is the biggest tire I could "safely" use out back?
I'm thinking of going with a 275/40/18 out back and sticking with 255/45/18 in front.

 

I would go 285/40/18 in the rear. That would be the closest O.D. to the stock size.

 

What offset are you referring to with this?

 

I'm getting the 40mm offset all around...

 

Is that safe on a 18" x 9" wheel?

 

minimum recomended width for 285 is a 9.5" rim. Even 275's look like there pushing it on a 9" rim.

 

Good call. Revlefty is correct.

 

dang, I really want to go a little wider out back, especially now that I have more power, but these don't come in 10s...

 

hmmm..according to the Nitto site, 275/40/18 is ok on a 9" wheel.

 

Any more pics? I'm wanting to run the Shelby 18 x 9 wheels and put 275/40/18's on.......anybody running this combo all around?

 

I have that setup out back..see my thread...

http://forums.bradbarnett.net/showthread.php?t=65710

 

The 20x9 are now available in the 40mm offset. I just got mine in today.

 

welcome to the club!

 

That's the guinea pig I've been waiting for.

What tires/size are you putting on?

 

P265/35/20 on all four