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S80 Tyre size quandary

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Old Jun 8th, 2019, 00:20   #21
Kev0607
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Quote:
Originally Posted by AndyV7o View Post
245/40 are 10mm wider and the sidewall a little taller, thus there is a small amount more air volume which may dampen the road and provide extra comfort, to a small degree.
Likewise there would be a slight increase in roadholding, and the speedo will read closer to what the actual speed is.
Thank you for your reply. So the 245/40/R18's are as comfortable as I'm going to get basically, otherwise other sized tyres like what I have on are classed as a modification?
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Old Jun 8th, 2019, 00:30   #22
AndyV7o
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In 18" yeah.
You can get more comfort if you drop wheel size.
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Old Jun 8th, 2019, 20:34   #23
Kev0607
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In 18" yeah.
You can get more comfort if you drop wheel size.
I got four brand new 245/40/18's fitted today. I went for a budget brand (Apanya),as I don't do major miles. The noise level seems good & the car drives nice with the wider wheel. £240 fitted & balanced.
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Old Jun 9th, 2019, 11:59   #24
JGEM
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Default Tyre issue resolved

OK, so I replaced my 2 rear tyres with the correct 245/40 R18 size so I could pass the annual safety check . (NZ WOF)

Whilst at the tyre place I pointed out the front being a slightly different size (235/40 R18) and the tyre shop guy said that given the small difference in size not to worry and just to wear out the front tyres as is and then replace them with the correct size next time around. The car drives and handles fine and I don't believe there is any safety issue from such a small variation between front and rear tyres

Sold the car this weekend anyway. Now my wife is driving an XC60 with 4 new matching tyres.
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Previous: 1994 940GL wagon, 2008 S80 3.2 AWD, 2004 V50 2.4, 2009 XC60 D5 AWD
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