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GT2 Wheels on C4S

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9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHGT2 Wheels on C4S

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Run 315/30/18 - 235/40/18

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Suggestion · Original poster

I have also run 315/30/18 - 235/40/18 with only slightly rolled rear fender lips, but that was with GT2 wheels.

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GT2 Wheels on C4S
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Leading evidence: 'Run 315/30/18 - 235/40/18' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run 315/30/18 - 235/40/18' (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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Run wider tires than the current 315/25s

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Suggestion

i have 19x12s and i'd most definitely rub if i was running wider tires than the current 315/25s, but i'm prob not one to speak here since my offsets and diameter..

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GT2 Wheels on C4S
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Run 315/30/18 - 235/40/18

No successful repair reported for this finding.

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Suggestion · Original poster

I have also run 315/30/18 - 235/40/18 with only slightly rolled rear fender lips, but that was with GT2 wheels.

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GT2 Wheels on C4S

Run wider tires than the current 315/25s

No successful repair reported for this finding.

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Reported fixes
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Unsuccessful attempts
1
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Read evidence and context
Discussions that contain suggestions
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion

i have 19x12s and i'd most definitely rub if i was running wider tires than the current 315/25s, but i'm prob not one to speak here since my offsets and diameter..

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GT2 Wheels on C4S
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9 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Rennlist: 1 discussions

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POST 1 / ORIGINAL POSTEROriginal post

Hello, I am thinking of putting some GT2 wheels on my C4S. Do you have any pics of your car? How do you like the setup? Thanks, Rene Here are the pics you requested. 335/30/18 rear, 245/40/18 front on GT2 wheels. I love the cornering. Expect 1.2 -1.4 g with Pilot Sport PS2s! Ric Vieler :-) 996 C4S 001.jpg 996 C4S 002.jpg 996 C4S 003.jpg

POST 3Original post

I had no idea that you could go that wide, are the rims different from the 996 tt? are they hollow spoke, and how much do they wieght?

POST 4Original post

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference 245/40-18 3.9in 12.9in 25.7in 80.8in 784 0.0% 335/30-18 4.0in 13.0in 25.9in 81.4in 778 0.8% actually its only a .8% error which is awesome... are your speedo reading better with this setup than the stock wheels?

POST 5Original post

That setup works for the GT2 wheels because of the 12" rears. I wonder if a 245/335 works for the factory C4S/TT 8" front and 11" rear? Maybe just 235 and 315 would be sufficient, no?

POST 6Original post

i have 19x12s and i'd most definitely rub if i was running wider tires than the current 315/25s, but i'm prob not one to speak here since my offsets and diameter.. not the same as above. but i'd bet that 335s would not work on 12" rears without some modification to the fenders.

POST 7 / ORIGINAL POSTEROriginal post

Benjamin: You are correct. Front and rear fender liners require modification, and the rear fender lips need rolled with the 335/30/18 - 245/40/18 combination. This is only possible with the C4S as the turbo and GT2 have addition constraints. Arnee: I have also run 315/30/18 - 235/40/18 with only slightly rolled rear fender lips, but that was with GT2 wheels. Redridge: The speedometer requires recalibration (but it requires calibration from the factory) Jumper: The rims are not hollow, but they are very light. I don't know the actual weight. Ric :-)

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