Wheels/Tyres: - 195/60 or 205/60 ?

munchausen · Jun 26th, 2013, 00:41

was offered a set of volvo mags. they come with 205/60/25 tyres.
my mechanic says he wouldnt recommend them as the 205 tyres are too wide.
why is a 205/55/15 OK but a 205/60/15 not ?
I realise i can swap tyres over but that would add to the cost.

Danhere · Jun 27th, 2013, 19:51

Your quoting 4 different tyre sizes there (including a 25 inch one), its a bit confusing.
Arch clearance, wheels/rims(mags) fitting over brake assembly and amount of offset can all be issues.
The main one being the need to keep the diameter and circumference of the wheel including the tyre, as close to the cars original specification, in order to maintain the legally correct corresponding speedometer reading/callibration.

Some relevant web pages:

http://www.thecarexpert.co.uk/how-ac...r-speedometer/

http://www.alloywheels.com/Tyre_Calculator

http://www.1010tires.com/Tools/Wheel-Offset-Calculator

http://www.event-tyres.co.uk/tyres/tyre-size-guide/

surrey_man · Jun 27th, 2013, 22:30

I use a 205 55 R16. Or 205 50 R16

munchausen · Jun 27th, 2013, 23:43

OK, well pretty obviously the 25 should have been a 15.
the wheels on the car are Chiron which i dont like the look of.
the ones on offer are Cetus. The tyres on the Cetus are worn so i may just get them anyway and replace them with 205/55 sometime in the future.

AcidicDavey · Jun 28th, 2013, 00:28

The reason 205/55/15 is OK but a 205/60/15 tyre is not is because of the difference in the height of the sidewall which would give you a different reading on the speedo. With the latter tyre the wall is about 10mm taller.

Tyres with 205 width will be fine on an 850, I have 225s on mine but the wheels are 7.5 inches wide! I'm guessing 850 Cetus' are about 6-6.5?

Danhere · Jun 28th, 2013, 05:36

http://www.kouki.co.uk/utilities/vis...ize-calculator

Jun 26th, 2013, 00:41	#1
munchausen Member Last Online: Dec 24th, 2014 22:15 Join Date: Dec 2007 Location: Latitude 19 South	195/60 or 205/60 ? was offered a set of volvo mags. they come with 205/60/25 tyres. my mechanic says he wouldnt recommend them as the 205 tyres are too wide. why is a 205/55/15 OK but a 205/60/15 not ? I realise i can swap tyres over but that would add to the cost.

Jun 27th, 2013, 19:51	#2
Danhere Member Last Online: Jun 10th, 2022 17:30 Join Date: Nov 2010 Location: Glasgow	Your quoting 4 different tyre sizes there (including a 25 inch one), its a bit confusing. Arch clearance, wheels/rims(mags) fitting over brake assembly and amount of offset can all be issues. The main one being the need to keep the diameter and circumference of the wheel including the tyre, as close to the cars original specification, in order to maintain the legally correct corresponding speedometer reading/callibration. Some relevant web pages: http://www.thecarexpert.co.uk/how-ac...r-speedometer/ http://www.alloywheels.com/Tyre_Calculator http://www.1010tires.com/Tools/Wheel-Offset-Calculator http://www.event-tyres.co.uk/tyres/tyre-size-guide/ __________________ Signal Red V70 2.5 10v SE, manual,petrol,non turbo, MY:1997 mileage:177K Lunar Gold XC70 AWD D5 SE LUX, manual 6speed, 4C, Bi-Xenon, MY:2007 mileage:215K

Jun 27th, 2013, 22:30	#3
surrey_man Premier Member Last Online: May 26th, 2016 23:05 Join Date: Jul 2008 Location: Dulwich London	I use a 205 55 R16. Or 205 50 R16 __________________ '01 Silver V70 2.3 lt Pasted volvos '92 Silver 940se Turbo Easte 7 Seater 2.0lt BF200FT '94 Green 850 GLT 2.5lt 7 seater '97 850 CD T5 2.3lt full leather 7 Seater

Jun 27th, 2013, 23:43	#4
munchausen Member Last Online: Dec 24th, 2014 22:15 Join Date: Dec 2007 Location: Latitude 19 South	chiron V cetus OK, well pretty obviously the 25 should have been a 15. the wheels on the car are Chiron which i dont like the look of. the ones on offer are Cetus. The tyres on the Cetus are worn so i may just get them anyway and replace them with 205/55 sometime in the future.

Jun 28th, 2013, 00:28	#5
AcidicDavey Younger Member Last Online: Nov 1st, 2022 00:10 Join Date: Nov 2008 Location: Hereford	The reason 205/55/15 is OK but a 205/60/15 tyre is not is because of the difference in the height of the sidewall which would give you a different reading on the speedo. With the latter tyre the wall is about 10mm taller. Tyres with 205 width will be fine on an 850, I have 225s on mine but the wheels are 7.5 inches wide! I'm guessing 850 Cetus' are about 6-6.5? __________________ Current cars 98 V70 AWD - The Volvo with a twist! 96 Volvo 850 R Estate x2 01 Alfa 166 3.0 V6 'Zender'. + LY Clio 182

Jun 28th, 2013, 05:36	#6
Danhere Member Last Online: Jun 10th, 2022 17:30 Join Date: Nov 2010 Location: Glasgow	http://www.kouki.co.uk/utilities/vis...ize-calculator __________________ Signal Red V70 2.5 10v SE, manual,petrol,non turbo, MY:1997 mileage:177K Lunar Gold XC70 AWD D5 SE LUX, manual 6speed, 4C, Bi-Xenon, MY:2007 mileage:215K

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