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XC60 Front tyre wear

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Old Yesterday, 16:04   #11
Clan
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Originally Posted by ripstandem View Post
I have kept tyres well inflated yet still have excessive wear on inside edge of front tyres.
My XC60 is 2015 on 42k miles
Had all wheel alignment done couple of months ago, there was some dissalignment but nothing significant, all aligned now will see how things go over next 12 months.
At best part of 30k from a pair of tyres I won't throw any more money at the problem
Not sure what that means but in my experience there a big difference in tyre wear between 36 psi and 39 psi as to virtually stop inner edge wear on the S40/V50/C70 and the S60/V70/S80 / XC60 XC90 ranges.. If you are happy with the ride it is all bonus , longer tyre life , more even tyre wear , better wet grip , better fuel consumption , more precise steering . less power steering pump wear .. yes you would be surprised the incredible effort it takes to steer a volvo with 25 psi in the tyres ..
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Old Yesterday, 18:23   #12
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Not sure what that means but in my experience there a big difference in tyre wear between 36 psi and 39 psi as to virtually stop inner edge wear on the S40/V50/C70 and the S60/V70/S80 / XC60 XC90 ranges.. If you are happy with the ride it is all bonus , longer tyre life , more even tyre wear , better wet grip , better fuel consumption , more precise steering . less power steering pump wear .. yes you would be surprised the incredible effort it takes to steer a volvo with 25 psi in the tyres ..
36 psi as per manual, should be 35 psi but my pressure gauge only displays even numbers.
Have Volvo got it wrong with regards to tyre pressures?
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Old Yesterday, 18:29   #13
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36 psi as per manual, should be 35 psi but my pressure gauge only displays even numbers.
Have Volvo got it wrong with regards to tyre pressures?
Volvo have had it wrong for as long as I can remember , try steering a 140 or a 340 with 28 psi tyre pressures :-) currently running a 340 at 36 psi no problems which is what I set them to 40 years ago . Any sports tyre with a lower profile than 50% should be set to 38 psi minimum otherwise you will bend a rim if you hit a pothole , the tyre will squish right down until the edge of the rim hits the folded tyre wall then there is nothing else to give except the rim .
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Old Yesterday, 18:56   #14
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Volvo have had it wrong for as long as I can remember , try steering a 140 or a 340 with 28 psi tyre pressures :-) currently running a 340 at 36 psi no problems which is what I set them to 40 years ago . Any sports tyre with a lower profile than 50% should be set to 38 psi minimum otherwise you will bend a rim if you hit a pothole , the tyre will squish right down until the edge of the rim hits the folded tyre wall then there is nothing else to give except the rim .
I think I will stick to Volvo specifications.
Very interesting thoughts though.
40 years years is very impressive tyre lifespspan, what make are they?
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Old Yesterday, 20:12   #15
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I think I will stick to Volvo specifications.
Very interesting thoughts though.
40 years years is very impressive tyre lifespspan, what make are they?
I meant when I was looking after 340's 40 years ago , 38 psi are volvo specifications its called ECO settings now it will say on a label on the door post ... keep a tread depth gauge handy and monitor the edge depths and centre depths of your tyres regularly . ...
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Old Yesterday, 21:43   #16
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The other possibility no-one has mentioned is straddling speed cushions, particularly worn ones. If you go over many of these, you can easily wear the inner part of the tread and sidewall without being aware of it.
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Old Yesterday, 22:59   #17
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The other possibility no-one has mentioned is straddling speed cushions, particularly worn ones. If you go over many of these, you can easily wear the inner part of the tread and sidewall without being aware of it.
I personally think that's an urban myth - you'd have to drive over them constantly, mile after mile, to have any significant effect.
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Old Today, 09:06   #18
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I personally think that's an urban myth - you'd have to drive over them constantly, mile after mile, to have any significant effect.
very very true
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Old Today, 11:20   #19
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Wear on the inner edges of both front tyres is almost certainly excessive toe-out.

In contrast, incorrect tyre pressure causes disproportionate wear to the centre of the tread when too high, or to both outside edges of the affected tyre when too low.
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Old Today, 11:25   #20
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Wear on the inner edges of both front tyres is almost certainly excessive toe-out.

In contrast, incorrect tyre pressure causes disproportionate wear to the centre of the tread when too high, or to both outside edges of the affected tyre when too low.
conventionally yes, but with the negative camber now on the more modern volvos the inner edges wear with low tyre pressures .. I have seen it countless times when the geometry is within specifications .
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