Planet-9

20 inch tire pressure recommendations

Add to repair workspace

New repair projectOpen repair workspace

Original source

3 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH20 inch tire pressure recommendations

Leading reported evidence

Set should not be

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
(It also cautions that the comfort setting should not be used at speeds above 165 mph - really good to know here in the Washington DC area!)
Original post Read captured discussion
20 inch tire pressure recommendations

Read full discussion summary

Leading evidence: 'Set should not be' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Set should not be' (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 · 3 captured posts examined · 1 partial discussions

Compare 1 other evidence results

Set tires

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 dealer had set the tires to the comfort setting.
Original post Read captured discussion
20 inch tire pressure recommendations

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.

Set should not be

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
(It also cautions that the comfort setting should not be used at speeds above 165 mph - really good to know here in the Washington DC area!)
Original post Read captured discussion
20 inch tire pressure recommendations

Set tires

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 dealer had set the tires to the comfort setting.
Original post Read captured discussion
20 inch tire pressure recommendations

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.

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

Planet-9: 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: 20261026T225432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

The door stickers on the 991 Carerra S list cold pressures of 36 front, 44 rear. The owners manual lists 36 front, 44 rear as the "full load" setting and 31 front, 39rear as the "part load" setting. (It also cautions that the comfort setting should not be used at speeds above 165 mph - really good to know here in the Washington DC area!) These recommendations are higher, with larger differences between front and rear than I have seen before (e.g., 19s on my Boxter S). The dealer had set the tires to the comfort setting. (Guess they think I am wus.) But I tried it at the higher settings. The ride comfort seems not at all affected by the higher settings (which seem really high to me) but I haven't yet explored how the handling is affected. I don't plan to do a lot of driving above 165. Any thoughts?

POST 2Original post

Tire pressure is also load dependent. Higher pressures with a lower load will manifest themselves as wear in the center of the tires over time. Higher pressure will improve mpg, well maybe , due to less friction.

POST 3Original post

I would bet that modern tires can be structured to do just what tire engineers desire. They could be engineered to deform upwards in the center when over inflated, or deform upwards in the center due to rotation forces if they were under inflated, or not to deform in the center at all. Did pre 20 inch 911s have the same kinds of pressure recommendations? Do 981s with 20s - with obviously different tire loadings, have such high pressures specified?

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