Porsche Club GB

2004 C2 Tyre size increase

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2 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH2004 C2 Tyre size increase

Leading reported evidence

Install gt3 tyre sizes

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that performed work without a confirmed outcome: 1

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Performed · outcome unconfirmed · Original poster
I've read on other forums where owners have fitted the GT3 tyre sizes that they fit without rubbing on inner or outer wheel arches (front or rear) - albeit on wider rims than the standard 10inch rears / 8 inch fronts that I have.
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2004 C2 Tyre size increase

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Leading evidence: 'Install gt3 tyre sizes' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install gt3 tyre sizes' (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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Install larger tyres - absolutely no issues

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
UPDATE : Based on posts on RennTech forums, I went ahead & fitted the larger tyres - absolutely no issues with clearances, interference rubbing under lock / suspension movement.
Original post Read captured discussion
2004 C2 Tyre size increase

Use 295/30x18 rears

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion · Original poster
Has anyone got experience of using 295/30x18 rears with 235/40x18 fronts on a C2 ?
Original post Read captured discussion
2004 C2 Tyre size increase

Use these tyre sizes

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
Has anyone direct experience of using these tyre sizes on a C2 & if so were there problems ?
Original post Read captured discussion
2004 C2 Tyre size increase

Frequently discussed actions (4)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Install gt3 tyre sizes

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
I've read on other forums where owners have fitted the GT3 tyre sizes that they fit without rubbing on inner or outer wheel arches (front or rear) - albeit on wider rims than the standard 10inch rears / 8 inch fronts that I have.
Original post Read captured discussion
2004 C2 Tyre size increase

Install larger tyres - absolutely no issues

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
UPDATE : Based on posts on RennTech forums, I went ahead & fitted the larger tyres - absolutely no issues with clearances, interference rubbing under lock / suspension movement.
Original post Read captured discussion
2004 C2 Tyre size increase

Use 295/30x18 rears

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
Has anyone got experience of using 295/30x18 rears with 235/40x18 fronts on a C2 ?
Original post Read captured discussion
2004 C2 Tyre size increase

Use these tyre sizes

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster
Has anyone direct experience of using these tyre sizes on a C2 & if so were there problems ?
Original post Read captured discussion
2004 C2 Tyre size increase

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Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

2 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Porsche Club GB: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

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Generation: 20261027T035758Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Has anyone got experience of using 295/30x18 rears with 235/40x18 fronts on a C2 ? I've got a 2004 C2 with the standard 285/30x18 rears & 225/40x18 fronts & want to improve dry grip by fitting Pirelli PZero Corsa's - which I believe are a better compromise than the Michelin Pilot Sport Cup tyres for mainly road use - but with occasional track day outings. Everyhting I've seen suggests the Michelin Cups are a better track tyre - but need more warming up than the Corsas. My existing Pirelli PZero Rosso's are about worn out - so now's the time to have a look at the options! Unfortunately the Corsa's are only available in the slightly wider 295 / 235 widths (as fitted to the 996 GT3) - so I want to be sure there won't be fitting problems before I order them. I've read on other forums where owners have fitted the GT3 tyre sizes that they fit without rubbing on inner or outer wheel arches (front or rear) - albeit on wider rims than the standard 10inch rears / 8 inch fronts that I have. As the GT3 uses the narrow C2 body without wheel arch modifications if I understand correctly, it would make sense that they should fit without issues. Has anyone direct experience of using these tyre sizes on a C2 & if so were there problems ? I don't think C4 fitment is relevant as the wider rear I guess should result in no problems. Thanks for any input - Paul 2004 C2 Anniversary (Including 345 bhp engine, sports suspension etc)

POST 2 / ORIGINAL POSTEROriginal post

UPDATE : Based on posts on RennTech forums, I went ahead & fitted the larger tyres - absolutely no issues with clearances, interference rubbing under lock / suspension movement. Now the only challenge is to investigate how much extra grip I've got in the dry !

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