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Maximum wheel /tyre combinations for a 993. - Page 1 - Porsche General - PistonHeads UK

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YOUR RESEARCHMaximum wheel /tyre combinations for a 993. - Page 1 - Porsche General - PistonHeads UK

Leading reported evidence

Install 18" turbo wheels

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I've got factory fitted 18" Turbo wheels on my narrow body C4, and the sizes are 225/40 ZR18 front and 265/35 ZR18 rear.

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Maximum wheel /tyre combinations for a 993. - Page 1 - Porsche General - PistonHeads UK
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Leading evidence: 'Install 18" turbo wheels' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install 18" turbo 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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1 matching discussions · 8 captured posts examined · 1 partial discussions

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Run 18s, still available ttbomk

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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.

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Suggestion

95 and earlier cars require a rack brace to run 18s, still available TTBoMK.

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Maximum wheel /tyre combinations for a 993. - Page 1 - Porsche General - PistonHeads UK
Frequently discussed actions (2)

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

Install 18" turbo 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

I've got factory fitted 18" Turbo wheels on my narrow body C4, and the sizes are 225/40 ZR18 front and 265/35 ZR18 rear.

Original post Read captured discussion
Maximum wheel /tyre combinations for a 993. - Page 1 - Porsche General - PistonHeads UK

Run 18s, still available ttbomk

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

95 and earlier cars require a rack brace to run 18s, still available TTBoMK.

Original post Read captured discussion
Maximum wheel /tyre combinations for a 993. - Page 1 - Porsche General - PistonHeads UK
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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.

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

  • PistonHeads: 1 discussions

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

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Generation: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

Dave, its normally 8s and 10s for 18s, and NOT the same rear offset as S and TT (which is 40). The owners manual lists all the variants, do you not have one? Narrow body tyres are normally 225/40 F, 265/35 R - these fit without rolling wheel arches, others may require ... and you need to be careful with non-standard sizes, both from an ABS perspective (it may not work) and an N rating perspective (which your insurance company might hiccup over). 95 and earlier cars require a rack brace to run 18s, still available TTBoMK. HTH, cheers Maurice

POST 2Original post

I've got factory fitted 18" Turbo wheels on my narrow body C4, and the sizes are 225/40 ZR18 front and 265/35 ZR18 rear.

POST 3 / ORIGINAL POSTEROriginal post

What would I do without the likes of this forum. Thanks guys!

POST 4Original post

Steve, I think these will be Turbo clones, as genuine hollow spokes were not produced other than 40 offset for the rear - I think these might not get under the arches. What's your (wheel oriented) option number? And what type of valve is fitted? Cheers, Maurice >> Edited by MauriceC2S on Wednesday 30th April 21:30

POST 5Original post

Yes I think they are solid spoke. I don't recall the option code. I will have a look, as and when I remember to. The valves look fairly unremarkable to me. What should they look like?

POST 6Original post

Steve, its just a quick way to identify hollow spokes - they have a steel valve bolted in, OEM solid spokes have rubber. Hollow spokes are much lighter and command a premium. Cheers, Maurice

POST 7Original post

OK, well, they are rubber which confirms they are solid spoke which is what I expected anyhow. They don't do a great deal for the ride quality. I should think the lower unsprung weight of the hollow spoke wheels would help in that regard.

POST 8 / ORIGINAL POSTEROriginal post

If I wanted to change to 18" rims and tyres for my 993 C4 (not wide body), what is the accepted norm for width front and rear and what tyre profiles suit?

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