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Discussion summary
YOUR RESEARCHAre my tires supposed to rotate on the rim? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported or suspected cause
under inflation, combined
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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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.
Discussions that report identifying a cause
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.
Reported cause
In my experience, a tire slipping on a rim is caused by under inflation, combined with aggressive driving.
Are my tires supposed to rotate on the rim? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed work
Check any dents was
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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
So I've been chasing down this vibration issue, and something I noticed when taking my car to get the rims checked for any dents was that my center caps which I had recently aligned perfectly were now misaligned.
Are my tires supposed to rotate on the rim? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'under inflation, combined' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'under inflation, combined' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check any dents was' (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.
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
So I've been chasing down this vibration issue, and something I noticed when taking my car to get the rims checked for any dents was that my center caps which I had recently aligned perfectly were now misaligned.
Are my tires supposed to rotate on the rim? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use piece of chalk and marked a straight line
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
So, to double check I used a piece of chalk and marked a straight line on each tire down to the center of the wheel.
Are my tires supposed to rotate on the rim? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check i
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 · Original poster
So, to double check I used a piece of chalk and marked a straight line on each tire down to the center of the wheel.
Are my tires supposed to rotate on the rim? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check later
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
A better way to check this is to mark the tire at the location of the valve stem and then check later to see if the mark on the tire has moved in relation to the valve stem.
Are my tires supposed to rotate on the rim? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (8)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check any dents was
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
So I've been chasing down this vibration issue, and something I noticed when taking my car to get the rims checked for any dents was that my center caps which I had recently aligned perfectly were now misaligned.
Are my tires supposed to rotate on the rim? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check later
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
A better way to check this is to mark the tire at the location of the valve stem and then check later to see if the mark on the tire has moved in relation to the valve stem.
Are my tires supposed to rotate on the rim? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Recommend seeing if you can find someone/someplace
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 believe this was suggested in your other thread, but I would recommend seeing if you can find someone/someplace that would let you briefly borrow a set of replacement wheels (for at least your fronts) to confirm that your vibration issue lies with either your rims or tires.
Are my tires supposed to rotate on the rim? - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.
20 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 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: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hey everyone -
So I've been chasing down this vibration issue, and something I noticed when taking my car to get the rims checked for any dents was that my center caps which I had recently aligned perfectly were now misaligned. So, to double check I used a piece of chalk and marked a straight line on each tire down to the center of the wheel. Much to my surprise, both wheels on my passenger side had rotated almost 360 degrees over the course of a 20 minute drive.
Is this normal? Could this be causing my vibration issue at highway speeds and overly jerky steering on poor roads?
It is completely normal for a tire to rotate on the rim (to some degree). With that being said, 360 deg in 20 mins seems somewhat excessive.
And yes, this could easily cause an out of balance situation. The wheel and tire are balanced with the tire at a certain location. If the tire was to creep around the rim, then the weight might not be in the correct location in relation to the tire causing an out of balance condition.
A better way to check this is to mark the tire at the location of the valve stem and then check later to see if the mark on the tire has moved in relation to the valve stem.
Good idea - I'll retest again tomorrow and see if it is still just as bad. What could be causing this? An issue with how the tire was mounted? Or maybe a defect with the rim?
While I won't argue with stone, I would clarify that, while it may happen, it's not supposed to.
In my experience, a tire slipping on a rim is caused by under inflation, combined with aggressive driving.
If a tire has rotated on a wheel, it is no longer balanced.
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Tire are at 29 psi in the front and 36 in the rear, cold. My drive today was not aggressive - just from Home Depot back to home, kept her under 4k rpm the whole time.
wow! tire should not slip or move around the wheels/rim. Like other mentioned if too low tire pressure and aggressive driving will make that happen. But with 29psi and just driving on local street, tire should not slip from the rim.
With a clean rough bead and proper mounting a tire should not move on the rim under normal driving. Drag race cars have this issue on hard launches but thats with 500+ hp and sticky rubber
Drag race cars with 500hp don't have this problem any longer, hehe. We used to have this problem, when we were using bias ply tires. But with the advent of drag radials, it takes a lot more than 500hp to spin the tire on the rim.
Offroad / rock crawlers have this problem a ton, because they air down to 8-12psi. That's why they have what's called a "beadlock" on them.... because they don't want tires spinning on the wheel either.
Again: if your tires are slipping on the wheel, this should be corrected.
Sent from my SM-G930T using Tapatalk
Yep - agree 100%.
Always chuckled when I ran Toyo Proxy R888s and how much they moved around a rim... particularly rear. I'd index when mounting new and see how quickly I could get one to rotate 360 degrees around...
I believe this was suggested in your other thread, but I would recommend seeing if you can find someone/someplace that would let you briefly borrow a set of replacement wheels (for at least your fronts) to confirm that your vibration issue lies with either your rims or tires.
And for the record, I'd have never guessed that your tires were spinning on the rims. Good catch...
Are you saying you put a continuous line of chalk on both the tire and the wheel, and after driving some distance the chalk line "split" into two lines on the same tire/wheel?
Or are you saying you marked lines on your front and rear tires, and after driving they are no longer aligned in the same direction? This instance, along with center caps, are impossible to keep aligned from front to rear because your front and rear tires are different sizes. And they won't stay aligned passenger side to driver side, because when you make a turn the outside wheels turn more than the inside wheels.
But if it's the first case, where the single line on one tire/wheel splits into two, that's freakin weird man.
You know, I think I need to re-do my test. I had some doubts while I was falling asleep last night and this morning I checked and my center caps are a bit loose on that side compared to the other. I'll re-check tonight and report back.
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