fullymatted.
Back to search
Rennlist

What do tire numbers 285-30ZR-18 n2 mean?

Add to repair workspace
Open repair workspace
Original source
7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHWhat do tire numbers 285-30ZR-18 n2 mean?

Leading reported evidence

Use speeds

Suggestion or failed attempt

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 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

This doesn't get into the separate discussion whether you need to get N tires for US road use speeds .

Original post Read captured discussion
What do tire numbers 285-30ZR-18 n2 mean?
Read full discussion summary

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

Frequently discussed actions (1)

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

Use speeds

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

This doesn't get into the separate discussion whether you need to get N tires for US road use speeds .

Original post Read captured discussion
What do tire numbers 285-30ZR-18 n2 mean?
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: 20261027T044418Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Newbie question. When I read 285-30ZR-18 n2, what do these measurements mean?

POST 2Original post

285 is the width of the tire in mm 30 is the sidewall height measured as a proportion of the width of the tire (why they did this...I don't know...) ZR=Z rated tire...which is as good as it gets. Check out tirerack.com to learn more about speed ratings...or just search google. -18=will work with an 18 inch wheel. n2-this is where I'll leave it to the experts...

POST 3Original post

If it is a Michlin Pilot Sport there are two different tread designs N1 and N2

POST 4Original post

I have pirelli asimmetrico with N3, what is that mean?

POST 5Original post

Porsche is the only make that orders tires to their own specifications in terms of tread compounding , carcass specs or sometimes slight tread pattern mods to optimize to their suspensions for handling and high speed use. That's why you will see the same sizes at Tire Rack, some with the N spec( for Porsches) and some without. They start at N0 for each brand name like P Zero Rosso or Conti Sport2 and progress upwards from there , but occasionally will skip a number - it's all a bit mysterious how they are serialized. This doesn't get into the separate discussion whether you need to get N tires for US road use speeds .

POST 6Original post

I also was curious about the "N" id in the tire description. I did a search on Tire Rack yesterday and they explained that this is a Porsche tire approval nomenclature. The incrementing number (N0,N1,N3) indicates the tire manufacture has updated the design of the tire model and subsequently it has been approved by Porsche. I just purchased my "previously driven" C2 and was searching for a message board on Google and came across this discussion forum. I think this forum is great!!

POST 7Original post

Here is all you need <a href="http://www.yokohamatire.com/utreading.asp" target="_blank">Yokohama Tire</a>

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