2006 Grand Prix GXP wheel offsets?

[mechanic58]

Anyone know what the offsets are on the stock GXP 18x8/18x7 staggered wheels?

[mechanic58]

Just answered my own question. The 8†wheel has a +40mm offset and the 7†wheel is +55mm.

[redgrandprix]

What brought on the question though?

 

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[mechanic58]

What brought on the question though?

 

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Im looking to put different wheels on my gxp and I wanted to make sure I got the correct offset. I wanna put +40’s all the way around it.

[mechanic58]

I’d really just like to have two more oem 8†wheels, but I cant find any that are cheaper than a whole set of new wheels.

[redgrandprix]

I’d really just like to have two more oem 8†wheels, but I cant find any that are cheaper than a whole set of new wheels.

If you look at aftermarkets that are listed as fitting they are usually 35mm which would look fine. I just got around to putting 2 more fronts on mine and i can honestly say it looks good but the bottom edge of the rear wheels stick out quite a bit. Will for sure spray rocks onto the back bumper

 

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[redgrandprix]

Or do an 8.5in wide wheel with 35mm offset would probably be similar to 40mm. I was trying to get a set of avid1 av 34 in gold or bronze but everybody was out of stock

 

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[mechanic58]

The smaller the + number the more they stick out. I dont want anything less than +40mm.

[redgrandprix]

It depends on the back spacing, keep in mind the factory wheel theres no lip so theres quite a bit of of backspacing. The wheels i was looking at had a lip which i want but came across stocks so had to jump on them

 

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[redgrandprix]

I might be thinking wrong but either way 5mm is a small number, just about all aftermarkets run 35mm offset and the look good

 

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[mechanic58]

An 8†wheel with a +40mm offset has a deeper backspace than the same wheel with +35mm offset. The stock 8†wheels have a +40mm offset and stick out borderline too far when mounted on the rear of the car. +35mm wheels would stick out too far for my liking.

 

The 7†stock rear wheels have a +55mm offset but have almost exactly the same backspace as the 8†front wheel with the +40mm offset. Its a little confusing, but its a fact. This is why they can be rotated without any inside interference. The back fit is the same.