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Old 03-03-2012, 08:02 PM   #1
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wheel size

I just sent a 2012 SS off for a tuner upgrade. The upgrade will lower the front of the car 1" and will lower the rear .8". I have the stock tires and 20" wheels that came on the car and was unimpressed with the tire/wheel option that the tuner offered. So I am going to get my own tires and wheels and mount them when I get the car back.

My question is what are my limits on size and width for my 20" tires/wheels? I have seen some posts on mod cars that have 9 or 10" on the front and 10 or 11" on the back. I would like to go with either a 9" front and 10 or 11" back. But I am not sure if I will need to mod the wheel wells to make this work. Can anyone tell me what the max size I can go with, front and back, without having to mod the wheel wells?
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Old 03-03-2012, 08:11 PM   #2
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The wheel wells will be fine, it just depends on what offsets you go with.
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Old 03-03-2012, 08:43 PM   #3
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Ok so if I go with 9" front and 11" rear how do I figure what offset I need or will the wheel manufacturer be able to calculate that for me?
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Old 03-03-2012, 08:47 PM   #4
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wheels really aren't my thing to be honest. I'm sure one of the wheels guys will chime in eventually.
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Old 03-03-2012, 08:48 PM   #5
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Thanks steiger.
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Old 03-03-2012, 09:28 PM   #6
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CCW has several styles of wheels that are 10" front and 11.5" rear and have no rubbing issues on cars lowered 1.5"+ and their offsets are perfect.....wheels/tires sit inside the wheel wells with no mods needed. Just need to tie back your E-brake cables as with any wider wheel set up. Mine is lowered 1"....
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Old 03-04-2012, 04:35 PM   #7
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Thanks fen.
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Old 03-05-2012, 08:27 AM   #8
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Quote:
Originally Posted by modcam View Post
Ok so if I go with 9" front and 11" rear how do I figure what offset I need or will the wheel manufacturer be able to calculate that for me?
The offsets should be:

20x9.0 = +20 to +35
20x11.0 = +35 to +40

The offsets will also vary depending on the design of the wheels. Which wheels are you interested in?
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Old 03-05-2012, 12:54 PM   #9
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I haven't made a final decision on the wheels yet but I am trying to narrow that down. So far the ones that I have seen that I like are Forgeline DE3S Wheels (without the orange bolts) and the TSW Nurburgring 20" Wheels. But I am still looking. I want a good, high quality wheel. Not going for something based on a low price.
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Old 03-05-2012, 08:16 PM   #10
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Quote:
Originally Posted by Speed Depot View Post
The offsets should be:

20x9.0 = +20 to +35
20x11.0 = +35 to +40

The offsets will also vary depending on the design of the wheels. Which wheels are you interested in?
I'm considering having my stock wheels widened to accomodate a bitter tire. From what I've read, the additional wheel width is added to the rear of the rim. How does this change the offset? Will I have problems? Is this a good idea?
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