911uk

Tyres

Add to repair workspace

New repair projectOpen repair workspace

Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHTyres

Leading reported evidence

Use n4

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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 · Original poster
I've Michelin PS2 n3 on the rear and front what's the difference with n3 and n4 and can I use n4 on the rear
Original post Read captured discussion
Tyres

Frequently discussed work

Check age of the tyre

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
The fronts take a good while to run down vs the rears so it's worth checking the age of the tyre from the dot code, on very old tyres the rubber can harden over time and be past it's best although perfectly safe/mot passing
Original post Read captured discussion
Tyres

Read full discussion summary

Leading evidence: 'Use n4' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check age of the tyre' (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.

Read captured replies

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

Compare 3 other evidence results

Check age of the tyre

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
The fronts take a good while to run down vs the rears so it's worth checking the age of the tyre from the dot code, on very old tyres the rubber can harden over time and be past it's best although perfectly safe/mot passing
Original post Read captured discussion
Tyres

Recommend only

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
Porsche recommend only using the same N rated tyres all round, but they would..
Original post Read captured discussion
Tyres

Use same n rated tyres all round

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
Porsche recommend only using the same N rated tyres all round, but they would..
Original post Read captured discussion
Tyres

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.

Check age of the tyre

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
The fronts take a good while to run down vs the rears so it's worth checking the age of the tyre from the dot code, on very old tyres the rubber can harden over time and be past it's best although perfectly safe/mot passing
Original post Read captured discussion
Tyres

Recommend only

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
Porsche recommend only using the same N rated tyres all round, but they would..
Original post Read captured discussion
Tyres

Use n4

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 Michelin PS2 n3 on the rear and front what's the difference with n3 and n4 and can I use n4 on the rear
Original post Read captured discussion
Tyres

Use same n rated tyres all round

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
Porsche recommend only using the same N rated tyres all round, but they would..
Original post Read captured discussion
Tyres

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.

911uk: 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: 20261027T000231Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I've Michelin PS2 n3 on the rear and front what's the difference with n3 and n4 and can I use n4 on the rear

POST 2Original post

Got this off Rennlist esy of Tire Rack.. Production tires that have passed all of the tests and received the engineering department's release can be branded with an N-specification. The N-specification brandings include: N-0 (N-zero), N-1, N-2, N-3 or N-4. These markings on a tire's sidewall clearly identify them as approved by Porsche for their vehicles. The N-0 marking is assigned to the first approved version of a tire design. As that design is refined externally or internally, the later significant evolutions will result in a new generation of the tire to be branded with N-1, N-2, N-3, etc., in succession. When a completely new tire design is approved, it receives the N-0 branding and the succession begins again. :wink:

POST 3Original post

Porsche recommend only using the same N rated tyres all round, but they would.. They sell more tyres at service time The fronts take a good while to run down vs the rears so it's worth checking the age of the tyre from the dot code, on very old tyres the rubber can harden over time and be past it's best although perfectly safe/mot passing Essentially there is no real issue with mixing n3 and n4 tyres fronts/rears as long as your ocd can handle it.

POST 4 / ORIGINAL POSTEROriginal post

Thanks everyone for that, so in theory n4 should be better than n3 or am I missing the point, but at my tyre garage were I go n3 are dearer than n4, it's doing my head in lol

POST 5Original post

The N rated thing is explained here --> http://911uk.com/template.php?page=3

POST 6Original post

Or just sack the whole N-rated thing off and get some newer, better, rubber on there (PS4 or PS4s depending on your wheel size).

POST 7Original post

There was a 911 model where it left the factory with different N rating numbers front and rear. 997 GT2RS I think. I'd take no notice.

This is a source reference. Confirm exact model applicability in the original material.