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Rear tire question

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHRear tire question

Leading reported evidence

Install 10" x 18" rear wheels

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

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
Porsche always installed 10" x 18" rear wheels on the 996.
Original post Read captured discussion
Rear tire question

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Leading evidence: 'Install 10" x 18" rear wheels' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install 10" x 18" rear 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.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

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1 matching discussions · 7 captured posts examined · 0 partial discussions

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Replace wheels at the same time

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
I went from 265/35s to 285/30s at the rear but changed wheels at the same time with 1/2" wider fronts.
Original post Read captured discussion
Rear tire question

Use 265/35-18

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
Even when they used the 265/35-18.
Original post Read captured discussion
Rear tire question

Frequently discussed actions (3)

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

Install 10" x 18" rear wheels

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
Porsche always installed 10" x 18" rear wheels on the 996.
Original post Read captured discussion
Rear tire question

Replace wheels at the same time

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
I went from 265/35s to 285/30s at the rear but changed wheels at the same time with 1/2" wider fronts.
Original post Read captured discussion
Rear tire question

Use 265/35-18

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
Even when they used the 265/35-18.
Original post Read captured discussion
Rear tire question

Coverage and how to read this overview

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.

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

Rennlist: 1 discussions

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

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261027T192637Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Current on my 99 C2 the rear tire size is 265/35ZR18. My question is, what are the plus and minuses and even if possible of moving up a size to 285/35ZR18. Thanks.

POST 2Original post

first question is what size rims front do you have? Next what is your alignment set at right now? Third what do you think of the handling, too much understeer?

POST 3Original post

I went from 265/35s to 285/30s at the rear but changed wheels at the same time with 1/2" wider fronts. The 20mm difference between 285s and 265s where compensated by wider front wheels (same size tire in both cases). The grip improved markedly,and there's a theoretical improvement in acceleration (smaller rolling diameter). This is a worthwhile update that pre '02 996s can benefit from.

POST 4Original post

I was told you need wider rear wheels to safely install the 285/30's. I too bought a set of wheels which included 8.5 fronts carrying 245/35 rubber. My rears are 10x18 which I believe is a step up from the standard pre '02 wheels. This of course was accomplished on my 99. I sold the 99 but still have the wheels and tires (see my ad in the classifieds).

POST 5Original post

<blockquote>quote:<hr />Originally posted by John H: I was told you need wider rear wheels to safely install the 285/30's.<hr /></blockquote>No, the 285's will work just fine on 10" wheels. Porsche always installed 10" x 18" rear wheels on the 996. Even when they used the 265/35-18.

POST 6Original post

I went from 265/35/18 to 285/30/18 with no problems. People warned of an increase of understeer but I didn't notice any.

POST 7 / ORIGINAL POSTEROriginal post

Thanks for all the replies/advice. I'm going to step up to the 285/35 and let you know what happens. Thanks all.

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