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Old Nov 15, 2022 | 02:15 PM
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Default Wheel offset

Has anyone experienced interference between tire and wheel well lining using standard size wheels and tires with a .300 offset front and .400 offset rear? Offset used to flush tire edges out to body.
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Old Nov 15, 2022 | 02:40 PM
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Stock wheel widths and diameters on stock tires with +34 on the fronts and +45 on the rears. No clearance issues or rubbing.
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Old Nov 15, 2022 | 03:04 PM
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Originally Posted by BADBIRDCAGE
Has anyone experienced interference between tire and wheel well lining using standard size wheels and tires with a .300 offset front and .400 offset rear? Offset used to flush tire edges out to body.
Stock widths and tyres with +20mm off set front and rear. Tyre has slight rub on wheel well lining only when front lift is actuated and 75% steering lock on.
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Old Nov 15, 2022 | 04:15 PM
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When we first did measurements on the car we encountered these small things that did cause slight rubbing. Please keep in mind this is what "we" encountered and its base off of our experiences and my personal knowledge.
1. The first time we built a set at 19x8.5 32et and 20x11 45et at first sight no problems at all however we noticed that we did get a rub on the front back fender area on the "mud flaps " when turning. this was easily solved by going with a higher off set which we did.

2. Another inconvenience but some can deal with it is that at a 35et or lower ( like a 30et ) some customers will also rub if they have the automatic lifts, what happens is that when the front end lifts up your most narrow part of your fenders go up to a wider area of the wheel, so at times you will rub an especially when turning.
a Higher et is always better as it will allow for your car to be driven like a maniac with out rubbing issues, its a balance for looks and function .
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Old Nov 15, 2022 | 04:21 PM
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Not stock wheels. The fronts are a size up and 1/2" wider and no rubbing problems.
20x9 ET +35 front with 255/30/20 michelin 4S
20x11 ET +40 rear with 305/30/20 michelin 4S



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Old Nov 15, 2022 | 05:26 PM
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Thanks to all that responded. Really appreciate it. Trying to help out a fellow C8 owner with an interference issue on his 2022 using the offsets I asked about.
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Old Nov 15, 2022 | 06:50 PM
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Default No Issues

No issues with these BBS rims + OEM Mich 4S (see attached PDF)
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Old Nov 16, 2022 | 09:12 AM
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Originally Posted by BADBIRDCAGE
Has anyone experienced interference between tire and wheel well lining using standard size wheels and tires with a .300 offset front and .400 offset rear? Offset used to flush tire edges out to body.
Yes, Anyone running wheels with a 30/40 offset will encounter slight rubbing of the stock size front tires on the splash guards especially if you have front lift. While it is probably the most aggressive offset for the C8, the issue is minor and can be addressed by modifying the front splash guards. They simply need to be trimmed to pull them closer to the liner. You will also need to add spacers to pull them back. While it's easily accomplished, some may find that this offset is NOT for them. The wheels are AG M520R , 19X8.5 @ 30MM and 20X11 @ 40MM. This combo pushes the wheels to their maximum limit, IMO while looking quite aggressive. With the modified, extended, GM splash guards, there is no rubbing. I have first hand knowledge. Here's some pics. Hope this helps! Or go with 35/45 or higher offset.

Pic of front splash guard with inner edge trimmed to pull them back. About a half inch is cut off/removed from the inner edge.

I fabricated some small aluminum 1/4" thick blocks and pop riveted them to the tabs. These block pull the guards back into the fender liner and compensate for the removed material. Along with the trimming of the edge, this mod retracts the guards enough to pull them away from the tires to avoid rubbing and provide the necessary clearance.

Front: No poke

Rear: No poke

Side view of my C8. Z51, mag ride, front lift, Paragon collars, lowered 3/4"...modded front splash guards, no rubbing issues!

Last edited by MAD Matt; Nov 16, 2022 at 09:19 AM.
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Old Nov 16, 2022 | 11:43 AM
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Thanks a TON Matt.
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Old Nov 16, 2022 | 11:58 AM
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Yes Sir, My pleasure! Like they say, a picture is worth a thousand words.
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Old Sep 6, 2024 | 09:25 PM
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I'm gonna revive this thread and ask with the new offests of the M520R, 34/45 is anyone having any rubbing issues now?
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Old Sep 6, 2024 | 09:47 PM
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Stance SF03 Stance Wheels, 19X8.5+34MM | 20X11+45MM

perfect flush fitment with stock OEM tires as far as Im concerned….


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Old Sep 11, 2024 | 05:48 PM
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We run a 9 +32 | 12 +48 and it's super flush no rubbing at all.



Velgen SL-5

Velgen SL-5
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