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S60 & V60 '11-'18 / XC60 '09-'17 General Forum for the P3-platform 60-series models |
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Damaged tyre in AWDViews : 1886 Replies : 17Users Viewing This Thread : |
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Mar 21st, 2020, 18:31 | #1 |
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Damaged tyre in AWD
Greetings,
I have a V60 AWD Cross Country. My NS front tyre has tyre wall damage so it needs changing preferably. Do I need to change both front tyres? I replaced both tyres October last year and the motor has done circa 5k since. Can I get away with changing one tyre? Or I have I gotta change both? TT
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Mar 21st, 2020, 21:29 | #2 |
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I would say you can replace just the damaged tyre.
Don't know what you have, but if say you have 18" wheels, that's a rough radius of 220mm. If you had say 235/60 tyres that would give an extra radius of 141 mm so 361mm total radius. Nominally, that gives a rolling circumference of 2269mm. If that radius is reduced by wear then 1mm wear (radius 360) gives circumference of 2262mm (0.3% less) 2mm wear (radius 359) gives circumference of 2255mm (0.6% less) So, intuitively I can't believe the inbuilt systems in the car cannot handle a variation across tyres of that small amount. Any issues with the calculations above should be directed to Mr Latham, my GCSE maths teacher.
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Mar 22nd, 2020, 12:55 | #3 | |
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Mar 22nd, 2020, 22:36 | #4 |
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Yes you can replace just the one tyre. There is no risk whatsoever to the AWD drivetrain - even if you had four different brands of tyres with different tread depths, the system can cope, just as it does with space saving spare wheels.
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Mar 23rd, 2020, 20:20 | #5 |
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Excellent news mate, thanks
TT
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Never underestimate the power of stupid. It’ can’t be reasoned or negotiated with and you’ll never never beat it…. Cut your losses, smile and walk away Currently Volvoless but Thong will be back |
Apr 8th, 2020, 14:31 | #6 |
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Pity other manufacturers cannot get a system to work like this (xDrive)
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Apr 8th, 2020, 20:43 | #7 | |
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TT
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Apr 8th, 2020, 22:35 | #8 | |
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Problem was having unmatched tyres could cause this to happen at motorway speeds and this then exerted considerable stress on the drive train that would eventually damage the transfer box or rear diff. On those cars you need to rotate tyres regularly and change them all at once with matching sets. You still see a lot of FL1's for sale with the prop removed to mask a knackered/missing transfer box. FYI AWD Volvo's up to the early 2000's had a similar system but for whatever reason we don't seem to hear of problems.
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Apr 12th, 2020, 21:06 | #9 | |
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TT
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Apr 12th, 2020, 23:19 | #10 | |
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You still see a lot on the roads though....
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