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Discussion Starter · #1 ·
We just put 265/40/18 tires on the stock 18x8 GT wheels. The tires fit the wheel very good, I am suprised. I thought they might bulge a little.

I'll be putting them on the car tomorrow or Wed, so I can dismount my VMRs that are up For Sale.

Pics:







VMR FS Thread:

http://www.g8board.com/forums/showthread.php?t=68344
 

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Looks good! I'd like to see pics of them on the car when you get them on there.
 

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You could put a 275/40 on the back. I have 255/45/18's on my chromed 6cyl rims same size and offset as the GT rims. I was going to get a set of 275's for the back but I bought a new set of rims and tires instead.
 

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Discussion Starter · #7 ·
Looks... strange, I loved your old wheels.
In about a month I'll have some new wheels :)

I really like the VMRs too, but I have an addiction and have to change for some reason.
 

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Discussion Starter · #9 ·

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Discussion Starter · #10 ·
Driving on these 265/40 Potenza today, and once they are warm, they stick pretty dang good.

Now, with the temp being in the high 20's / low 30's, getting them warm is a little challenging ;).
 

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Thanks for the info on this. I just ordered a set of four 265/40R-18 Bridgestone Potenza RE-11's for my stock 18" rims. Hopefully they fit with the rear end lowered like it is with the Spohn rear lower control arms. If not, I'll have them raise it up to the stock bolt location and get it realigned.
 

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Discussion Starter · #12 ·
No problem, you should be good. I am not lowered in the rear, but I do have BMR Trailing arms and Toe Rods.

I am suprised at how good these fit. Also, the Potenza has definately grown on me. These tires stick way better than I remember when I first got the car with the 245/40/19s.
 

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I need to resurrect this thread...I see these tires fit the stock 18x8 wheel with a +48, but does anyone think there would be clearance issues with 18X8 +35 offset wheel. My car is not lowered or rolled. Thank you.
 

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You're concerned about slightly "too much" tire height, but want tire bulge?

I would go 235/45/18 then. They will fit nicely on a 8" wheel
 

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Most tire manufacturers list a 9" to 10.5" rim for a 265/40/19 tire. 9.5 being optimal. I think you will find, not the whole tread makes contact with the road .
 

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Adding to the discussion of shorter-than-stock tires, here are my 255/40/18 and 285/35/18 tires, winter setup.

Land vehicle Vehicle Car Full-size car Motor vehicle

Land vehicle Vehicle Car Pontiac g8 Coupé


After coming from Camaro 20's, these look right at home in person. YMMV
 

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Discussion Starter · #19 ·
I didn't like 255/40/18s, felt like there was not enough tire sidewall for an 18" wheel.
 

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Thanks for the feedback. I feel like Goldilocks, one's too short...one's too tall... I really grew tired of seeing the 255/45 sidewall. The 245/45 is the most logical, but is too close to what I'm running now. From the pictures I'd swear my current 255/45 setup bulges more than the 265s. Costco had a great deal (and a great return policy) on a set of 265s. I'll mount one up and go from there.
 
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