13 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHTire size upgrade question
Leading reported evidence
Run 225/285
Performed · outcome unconfirmed
No successful repair reported for this finding.
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Leading evidence: 'Run 225/285' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace wheels' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed
For track events I run 235/40 and 295/30 MPSCs, but they are mounted on a custom set of CCW Classic 3-piece racing wheels in 18x9.0"/18x11.0".
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I am running 235/40/18 and 295/30/18 tires on my 01 C4, but I have wheels made for a GT3.
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Suggestion
I would personally stick with stick size tires unless changing wheels.
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Suggestion · Original poster
I am currently running 225/40/18's on my 7.5 front wheels.
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The stock tire size on a GT3 is 235/40/18 and 295/30/18. So considering that the GT3 is a narrow body, it should work. What I don't t know is whether these tires will fit on your 18" stock cab rims. I am running 235/40/18 and 295/30/18 tires on my 01 C4, but I have wheels made for a GT3.
cj
Yes and yes. As long as your rim size is at least 8" in the fornt and 10" in the rear. The 11" rear would be preferable but the 10" will hold a 295 just fine.
Yes, you have stock 18" wheels for an 01'. I would personally stick with stick size tires unless changing wheels. You can swap to 285/30's in back since this is a normal factory fitting on a 10" rim for 02'+. Over tiring stock wheels can cause issues like tramlining and inconsistant handling. For track events I run 235/40 and 295/30 MPSCs, but they are mounted on a custom set of CCW Classic 3-piece racing wheels in 18x9.0"/18x11.0".
would a 225/40/18 front and a 285/30/18 rear work well? I realize that you sort of answered this, but would that rear configuration be considered over tiring? Also would there be a significant difference in handling from the 265's?
That's the standard configuration on the 2002 cars, but they did have the 8in front wheel. I'm not sure I'd push it since the 225/40 on an 8in wheel is going to be a bit more stable. But, yes, it's doable. Frankly, you're not going to gain that much with a 285 on the rear unless you're planning on tracking soon anyhow (but agreed it feels out the rear better). So, are you?
