20/21 Wheel Setup
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Pro
Joined: Aug 2017
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From: NOVA
20/21 Wheel Setup
Wasn't sure if I should post this here or in Tech/Performance... but I'm really interested in seeing and hearing about anyone with a GS/Z running a 20/21 wheel setup instead of the 19/20.
There are three things I'm hoping to achieve;
There are three things I'm hoping to achieve;
- Better wheel well fitment - filling out the opening better (as I can't really lower the car...)
- Fixing the factory offset - I want the wheels flush with the fender edge (but not sticking out)
- Getting better rims on so I don't have to wince every single time I hit an expansion joint or minor blemish in the roadway (I've already replaced both rear rims and changed over to non-run flats)
Race Director
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From: Bonneville Salt Flats
Since you ask... twice... apart from what your specific questions addresses, the last thing needed on most roads is even less sidewall height. Just sayin'... All the best in any event. 
(p.s. imho, quality fully-forged aftermarket wheels should be considered part of the price of admission for any wide-body C7)
(p.s. imho, quality fully-forged aftermarket wheels should be considered part of the price of admission for any wide-body C7)
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Burning Brakes
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OP: if you have Instagram, check out 1cleanc7. He has the same Vossen wheels pictured above in the 20/21 setup. I too have the same wheels pictured above but in the regular 19/20 setup so I can't answer your questions.
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From: NOVA
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The wheels on that white GS do look very good, but as another member stated, those are very small sidewalls, especially on the back.
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Pro
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From: NOVA
Thread Starter
Pro
Joined: Aug 2017
Posts: 565
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From: NOVA
2nd Gear
Joined: Jun 2025
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I just bout some rims with this same dimensions. Do you know what offset the rears are? Tire shops are recommending a323 but I have 305’s and they rub on stock z51 rims. Do your rub and should I stick with a 305 or go 295?