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two different tread depths for Michelin Pilot Sport PS2 295/30ZR18

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7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHtwo different tread depths for Michelin Pilot Sport PS2 295/30ZR18

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Replace set of rears last year if it wasn't

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Suggestion

I think the actual tread pattern is different also, when I replaced a set of rears last year if it wasn't for the PS2 molded into the sidewall I would sworn they were a different tire.

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two different tread depths for Michelin Pilot Sport PS2 295/30ZR18
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Leading evidence: 'Replace set of rears last year if it wasn't' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace set of rears last year if it wasn't' (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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Replace tread depths due

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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

But i have seen before where they change tread depths due to handling issues.

Original post Read captured discussion
two different tread depths for Michelin Pilot Sport PS2 295/30ZR18
Frequently discussed actions (2)

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Replace set of rears last year if it wasn't

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

I think the actual tread pattern is different also, when I replaced a set of rears last year if it wasn't for the PS2 molded into the sidewall I would sworn they were a different tire.

Original post Read captured discussion
two different tread depths for Michelin Pilot Sport PS2 295/30ZR18

Replace tread depths due

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

But i have seen before where they change tread depths due to handling issues.

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two different tread depths for Michelin Pilot Sport PS2 295/30ZR18
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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.

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

  • Rennlist: 1 discussions

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Generation: 20261027T075545Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I need new rear tires for my 2004 C4S and plan to replace them with the same tires I've always used and been happy with: Michelin Pilot Sport PS2's. So I'm surfing the internet and comparing the various prices and noticed on costco's website they had two different choices for the same size tire 295/30ZR18/XL (98Y). Drilling down a bit I found there were two different Mfr P/N's, 39489 and 24923, and two different tread depths: 9.5 and 8.5 respectively. Surfing the internet a bit more brought up this document from Michelin: https://www.michelinman.com/upload/m...ot-sport-2.pdf All specifications for the two P/N's except for the tread depth are identical, incl. the tire weight down to 4 significant figures: 26.57lbs (despite the tread depth being different!). I couldn't find Mfg P/N's listed for the same tires from any other distributor (america's/discount tire, tire rack, etc.) I found all of this curious and thought I'd share it with you.

POST 2Original post

The only differences i found were the tire with 9.5 as the tread depth is porsche spec N3 and the tire with 8.5 is porsche spec N4. N4 being the newer spec if you are not familiar. Beyond that may require an email to Michelins tech support for answers. However since they are both porsche approved tires - whichever you can find cheaper sound better!

POST 3 / ORIGINAL POSTEROriginal post

Ah, interesting that the difference is N3 vs. N4. I wonder why they reduced the tread depth...

POST 4Original post

Trurhfully i have no idea. But i have seen before where they change tread depths due to handling issues. Believe it or not, too much tread causes a vehicle to wander at high speeds.

POST 6Original post

I think the actual tread pattern is different also, when I replaced a set of rears last year if it wasn't for the PS2 molded into the sidewall I would sworn they were a different tire.

POST 7Original post

I'm about to buy bigger Michelin's for a new set of rims I have coming to replace my current PS2s, I have found the N3 are more expensive than the N4 too Also don't quote me but in my case the speed index went up on the 3 vs. 4

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