S40 (New) Wheels/Tyres : - 16 to 18"

biggs312800 · May 11th, 2009, 14:07

Hi there this might sound like a daft question, but if you change your wheel size (16" to 18") do you have to have your speedometer calibrated, the reason why i ask is i saw a police tv program today and they mentioned it on there many thanks

whisky16 · May 11th, 2009, 14:29

Good question, as I have just bought a 2005 V70 SE D5 with 18 inch wheels (which seem to catch the inner wing area when turning).

The speed must be recorded inaccurately (under speed with larger wheels).

The tyres I have fitted are 235/40R 95Y, and even though the alloy wheels are nice, the price of the tryres is not.........so I am looking to go to a breakers yard for some original wheels - 17" I think.

biggs312800 · May 11th, 2009, 14:39

which alloys do you have i have 16s on mine and looking for a set of 18s if your up for selling i might be interested if they fit a s40 2.0d

Guru · May 11th, 2009, 15:26

I think that if you're changing from 16" with a tyre profile of 55 to 18" and a 45 profile then you wouldn't need to recalibrate your speedometer.

16-->55
17-->50
18-->45

Are all the same size, but wait for other opinions, don't take my word on it just yet..

Guru · May 11th, 2009, 15:37

Sorry, 45 profile on an 18" would be 9mm higher than a 55 on 16" providing both were 205

KFCKFC · May 11th, 2009, 23:02

My V50 (2007 model) was factory modified to accommodate the larger wheels see the attach http://vccs.volvocars.se/accessories...VCC-251722.htm which refers to instruction to restrict the turning circle, add rear bump stops and alter speedo calibration.

Hope this is of help.

May 11th, 2009, 14:07	#1
biggs312800 Senior Member Last Online: Sep 7th, 2016 10:03 Join Date: Oct 2008 Location: nottingham	16 to 18" Hi there this might sound like a daft question, but if you change your wheel size (16" to 18") do you have to have your speedometer calibrated, the reason why i ask is i saw a police tv program today and they mentioned it on there many thanks

May 11th, 2009, 14:29	#2
whisky16 New Member Last Online: Apr 12th, 2024 17:21 Join Date: May 2009 Location: Peterborough	Wheels and tyres Good question, as I have just bought a 2005 V70 SE D5 with 18 inch wheels (which seem to catch the inner wing area when turning). The speed must be recorded inaccurately (under speed with larger wheels). The tyres I have fitted are 235/40R 95Y, and even though the alloy wheels are nice, the price of the tryres is not.........so I am looking to go to a breakers yard for some original wheels - 17" I think.

May 11th, 2009, 14:39	#3
biggs312800 Senior Member Last Online: Sep 7th, 2016 10:03 Join Date: Oct 2008 Location: nottingham	which alloys do you have i have 16s on mine and looking for a set of 18s if your up for selling i might be interested if they fit a s40 2.0d

May 11th, 2009, 15:26	#4
Guru Premier Member Last Online: Oct 25th, 2023 07:46 Join Date: Feb 2009 Location: Between chair and keyboard	I think that if you're changing from 16" with a tyre profile of 55 to 18" and a 45 profile then you wouldn't need to recalibrate your speedometer. 16-->55 17-->50 18-->45 Are all the same size, but wait for other opinions, don't take my word on it just yet..

May 11th, 2009, 23:02	#6
KFCKFC Member Last Online: Mar 30th, 2024 20:48 Join Date: Jul 2008 Location: Hampshire View Photos By: KFCKFC	My V50 (2007 model) was factory modified to accommodate the larger wheels see the attach http://vccs.volvocars.se/accessories...VCC-251722.htm which refers to instruction to restrict the turning circle, add rear bump stops and alter speedo calibration. Hope this is of help.

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