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Less than 10 years old, the Japanese Tyre Manufacturers advisory limit which I use as probably the most appropriate for local (Taiwan) conditions.
UK conditions are much less harsh.
Lexus probably advise a lower limit, but then they don't make tyres, and its no skin off their corporate nose either.
Bottom line. NOBODY KNOWS. Up to you.
If you are extremely risk-averse, you could perhaps consider not driving. Safer AND planet friendlier.
Edited by edlithgow on 30/11/2021 at 00:21
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Indeed, I prefer not to drive and things were going that direction with the WFH front and the pandemic, however for some unconvincing reason we need to show our face in the office for tea and cake once a week.
I think that 10 years is looking for trouble as the mod say, so I will do well to change the current set with reputable Taiwanese tyres ( It think Nankang had some Yokohama involvement in their production).
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We used to tow a caravan which was stored outside, wheels off. After eight years we went away on holiday .
Both tyres failed .
After that, I replace tyres after 6 years unless Yaris which is runaround town only
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We used to tow a caravan which was stored outside, wheels off. After eight years we went away on holiday .
Both tyres failed .
After that, I replace tyres after 6 years unless Yaris which is runaround town only
Different situation.
Its alleged that flexion causes the migration of a protective wax to the tyre surface, so a completely unused tyre can deteriorate faster than a low use one
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We used to tow a caravan which was stored outside, wheels off. After eight years we went away on holiday - Both tyres failed .
After that, I replace tyres after 6 years unless Yaris which is runaround town only
Two things accelerate the degradation of tyre rubber, combined with the presence of oxygen : heat and UV light. And of course leaving a vehicle parked for months at a time.
If your tyres are kept in a cool dark place they will probably keep their youth for quite a few years.
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We used to tow a caravan which was stored outside, wheels off. After eight years we went away on holiday - Both tyres failed .
After that, I replace tyres after 6 years unless Yaris which is runaround town only
Two things accelerate the degradation of tyre rubber, combined with the presence of oxygen : heat and UV light. And of course leaving a vehicle parked for months at a time.
If your tyres are kept in a cool dark place they will probably keep their youth for quite a few years.
I suspect that's why all-season tyres have begun to get a lot more popular, as they work well over a much wider range of external conditions and temperatures.
In the final year I had the Bridgestone OEM tyres fitted to my car, they were not that bad (poor noise on rough surfaces) in the warmer months, but poor (noise, harshness, increased barking distances than previous years) otherwise, then the two incidents with the rear breaking away in the rain sealed their fate.
I wonder how much that newer compund tech has improved the life of tyres by improving their resistance to degridation from sunlight and from extremes of temperature? My last set of tyres (Dunlops) lasted very well in all respects, and were in far better condition when I changed them (I was changing tyre/wheel size* so couldn't retain them).
* corroded alloys (16-> 15in as far cheaper).
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If you are extremely risk-averse, you could perhaps consider not driving. Safer AND planet friendlier.
That says it all, at least as far as I'm concerned. The standard mantra 'tyres are your only contact with the road' is obviously true, but it's all about guessing probabilities. If you really want to reduce your risk to zero, stay at home.
There are risks there too, of course ....
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The standard mantra 'tyres are your only contact with the road' is obviously true, but
...it ignores axle stands, which are my other contact with the road, and for a significant portion of the time, too...so its obviously NOT true..
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The standard mantra 'tyres are your only contact with the road' is obviously true, but
...it ignores axle stands, which are my other contact with the road, and for a significant portion of the time, too...so its obviously NOT true.
I suppose that should be an astute observation, but it does rather limit the possibility of travel. Unless you have answer to that too ....
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The standard mantra 'tyres are your only contact with the road' is obviously true, but
...it ignores axle stands, which are my other contact with the road, and for a significant portion of the time, too...so its obviously NOT true.
I suppose that should be an astute observation, but it does rather limit the possibility of travel. Unless you have answer to that too ....
:-)
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The standard mantra 'tyres are your only contact with the road' is obviously true, but
...it ignores axle stands, which are my other contact with the road, and for a significant portion of the time, too...so its obviously NOT true.
I suppose that should be an astute observation, but it does rather limit the possibility of travel. Unless you have answer to that too ....
See your post above.
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He might be using them as ‘anti roll’ stabilisers stuck on the side? AMG didn’t just do Mercedes back in the day..
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He might be using them as ‘anti roll’ stabilisers stuck on the side? AMG didn’t just do Mercedes back in the day..
Well, if yáll insist on taking it seriously, I can probably come up with a better rationale than that.
Sidewall crack propagation is believed to be due to ozone snipping of polymer chains at the bottom of the crack, which are freshly exposed because the rubber is under tension, the tyre being inflated.
Over the uncracked surface of the tyre, ozone degredation is shallow, and the fresh rubber is protected by the overlying degraded rubber.
Thus, if you keep a little used car on stands with the tyres deflated when unused, you might expect less cracking, plus there will be less oxygen available for internal degredation.
I don't do this (in fact I over-inflate tyres, possibly promoting cracking) and I don't have parking that would allow me to, but the theory seems sound.
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<< Sidewall crack propagation is believed to be due to ozone snipping of polymer chains at the bottom of the crack, which are freshly exposed because the rubber is under tension, the tyre being inflated. >>
The strongest ozone attack will be at the bulges where the tyre rests on the road. Those would be worst when the tyre is under-inflated ! As happens when the owner has omitted to put his vehicle on those axle stands.
I don't think a couple of ats pressure in the tyre will have much effect on outer surface ozone attack.
Edited by Andrew-T on 04/12/2021 at 09:26
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The strongest ozone attack will be at the bulges where the tyre rests on the road. Those would be worst when the tyre is under-inflated
I see why you say that, but I'm not sure I agree. The cracks in that area will probably be more open, but I dont know that the rubber molecules at the crack base will be under as much tension as in an overinflated tyre, and I suspect no one else does either.
4WIW (very little, but personal anecdotal evidence influences personal opinion perhaps more than it should) I've had two tyres threaten to fail due to cracking, and they both developed bulges centred on cracks between the tread blocks, not the sidewall.
I don't think a couple of ats pressure in the tyre will have much effect on outer surface ozone attack.
I don't either.
Thats why I specifically referred to internal oxidation, which is the failure mode highlighted in the US Highway Agency investigations following the Ford Explorer rollover/Bridgestone blowout epidemic.
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