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Tyre size

Discussion on the exciting new 2017 Volvo cars built on the SPA platform.
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KWT2GG
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Joined: Wed Jan 01, 2020 11:31 am
Year and Model: VOLVO 2016 S90 T6
Location: Kuwait

Tyre size

Post by KWT2GG »

Hi:
I have an S90 T6 and having trouble with the too low profile tyre (255-35-20).
what is the highest tyre size I can fit?
i.e. will 255-45-20 fit without scrubbing?
Thanks
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RickHaleParker
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Re: Tyre size

Post by RickHaleParker »

The sidewall height on the 255-45-20 is: 255 mm * 0.45 = 101.75 mm..
The sidewall height on the 255-35-20 is: 255 mm * 0.35 = 78.75 mm.

A difference of 101.75 mm - 78.75 mm = 22.5 mm.
Is there enough clearance for another 22.5 mm?

The true speed would be 7.4% higher then the speedometer unless you get the speedometer recalibrated.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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