How much air? (Tire pressures)

Anton_g · 16-11-2004, 17:12

Wandering if anyone can enlighten me....

Standard oct vrs runs a 205/50/17 and something like 2.1 bar front 2.3 rears...

So seeing as i have 225/45/17 how much should i be filling them with?

Asked skoda they said go away non standard tire size!! Help i don't want to kill tires that cost me 90quid a corner!!

***DGW*** · 16-11-2004, 17:16

Use the recommended pressures for starters. (There is no 'book' answer.)

cmcm789 · 16-11-2004, 17:22

If the tyre wall is the same size, and the wheels are the same size, then i would assume you should use the same pressure.

After all the tyres are carrying the same loading.

There is quite a bit of variance between half load, full load, winter and summer pressures anyway, so sorry to say but - Near enough is good enough!

JD

boyced · 16-11-2004, 17:37

I was planning on checking my tyre preasure at the weekend. Are the pressure gauages in bar aswell as psi?

cmcm789 · 16-11-2004, 17:51

The one i use at sainsburys is switchable from Bar to PSI. I think the inside of the fuel cap only gives Bar if im correct.

JD

boyced · 16-11-2004, 17:52

Quote:

Originally Posted by cmcm789

The one i use at sainsburys is switchable from Bar to PSI. I think the inside of the fuel cap only gives Bar if im correct.

JD

Yes you are!

K44 ENT · 16-11-2004, 20:23

Tyre pressures change as temperature changes. I know this sounds sad but I have a chart listing what pressure the tyres have in dependant on ambient temperatures (providing the car has not recently been driven). Usually run mine at 32psi all round at 5 deg c, increasing by 1psi for every 5 deg c increase in temperature. Seems to work fine , maybe a bit of a firm ride but handles well. Have not noticed any uneven wear etc. This is only my opinion though

CHRIS ELLIS · 16-11-2004, 22:48

225/45/17s 31psi front 30psi rear thats what i'm told

Carsten · 16-11-2004, 22:55

I run mine with roundabout 32psi to 33psi ....
They did about 8.000miles and they show
no unusual wearout .

But now they hilbernate in the cellar

inquirer · 16-11-2004, 22:56

i had to have 2.6 bar front, 2.4 bar rear, anything lower and i would get uneven wear. Mind you this was in winter -5 to 10 C. This was with 225/45 17". I have noticed that the TDI's are real heavy in front makeing the suspension go real low (TDI engine + sump guard + driver). The rear seems like it has no weight at all.

Bomber · 17-11-2004, 09:10

Anton
Us caravan tuggers have the same problem with older caravans because the information is often not available:
One of the specialist mags said that:

"In the absence of advice from the caravan or trailer manufacturer, consult Michelin quoting the exact tyre dimensions, (including the Load index) and giving the actual axle load being carried by these tyres,"

You know the weight of the car and the other information is on the tyres. give it a go. in this case Mitchellin were very helpful

Freakcrab · 17-11-2004, 10:57

Quote:

Originally Posted by cmcm789

The one i use at sainsburys is switchable from Bar to PSI. I think the inside of the fuel cap only gives Bar if im correct.

JD

Odd. Mine only shows pressures in KPa.

owlets · 17-11-2004, 13:39

Quote:

Originally Posted by Freakcrab

Odd. Mine only shows pressures in KPa.

So does mine! Does enyone know how to convert from KPa to Bar/PSI as I've never found a machine that has KPa on it. I tend to put in 30 PSI for front and 31 for back but would love to know what I'm supposed to run std tires at

boyced · 17-11-2004, 14:33

google calculator! 1 kiloPascal = 0.145037738 pounds per square inch

http://www.google.co.uk/search?hl=en...e+Search&meta=

Nigel26 · 17-11-2004, 14:49

32psi in all of em, as recommended by my mate at national tyres... he knows his beans as well.

16-11-2004, 17:12	#1
Anton_g Briskodian Join Date: Sep 2004 Location: Brisol Posts: 40 Members Car: silver octavia vrs Thanks: 0 Thanked 0 Times in 0 Posts	How much air? (Tire pressures) Wandering if anyone can enlighten me.... Standard oct vrs runs a 205/50/17 and something like 2.1 bar front 2.3 rears... So seeing as i have 225/45/17 how much should i be filling them with? Asked skoda they said go away non standard tire size!! Help i don't want to kill tires that cost me 90quid a corner!! __________________ The consensus is that forward is better

16-11-2004, 17:16	#2
*DGW* BRISKODA Staff Join Date: Oct 2002 Location: Cambridgeshire Posts: 17,300 Members Car: Octavia 1.8T 4X4 Estate & Fabia vRS Thanks: 51 Thanked 208 Times in 157 Posts	Use the recommended pressures for starters. (There is no 'book' answer.) __________________ Denis 2002 Octavia 1.8T 4X4 turbo Estate - rebreathed on by Jabba ... 31.93mpg 2007 Fabia vRS - CC, ESP and full leather trim by Seat Surgeons ...48.57 mpg...

16-11-2004, 17:22	#3
cmcm789 Briskodian Join Date: Oct 2004 Location: Northern Ireland Posts: 965 Members Car: Octy Elegance 110 TDI (2003) Thanks: 0 Thanked 0 Times in 0 Posts	If the tyre wall is the same size, and the wheels are the same size, then i would assume you should use the same pressure. After all the tyres are carrying the same loading. There is quite a bit of variance between half load, full load, winter and summer pressures anyway, so sorry to say but - Near enough is good enough! JD __________________ Octy Elegance TDI (110bhp)

16-11-2004, 17:51	#5
cmcm789 Briskodian Join Date: Oct 2004 Location: Northern Ireland Posts: 965 Members Car: Octy Elegance 110 TDI (2003) Thanks: 0 Thanked 0 Times in 0 Posts	The one i use at sainsburys is switchable from Bar to PSI. I think the inside of the fuel cap only gives Bar if im correct. JD __________________ Octy Elegance TDI (110bhp)

16-11-2004, 20:23	#7
K44 ENT Briskodian Join Date: Jul 2004 Location: Midlands Posts: 238 Members Car: Sodd Octy vRS, now have a Mondeo Tdci (Never mind) Thanks: 0 Thanked 0 Times in 0 Posts	You could try this.... Tyre pressures change as temperature changes. I know this sounds sad but I have a chart listing what pressure the tyres have in dependant on ambient temperatures (providing the car has not recently been driven). Usually run mine at 32psi all round at 5 deg c, increasing by 1psi for every 5 deg c increase in temperature. Seems to work fine , maybe a bit of a firm ride but handles well. Have not noticed any uneven wear etc. This is only my opinion though __________________ Red Octavia vRS SOLD...Still got the TVR

16-11-2004, 17:37	#4
boyced fully boyced. Join Date: Jul 2004 Posts: 2,919 Members Car: Octavia vRS Thanks: 0 Thanked 0 Times in 0 Posts	I was planning on checking my tyre preasure at the weekend. Are the pressure gauages in bar aswell as psi?

16-11-2004, 22:48	#8
CHRIS ELLIS Briskodian Join Date: May 2004 Location: Hampshire Posts: 846 Members Car: Octavia Vrs MK11 Thanks: 10 Thanked 15 Times in 14 Posts	225/45/17s 31psi front 30psi rear thats what i'm told

16-11-2004, 22:55	#9
Carsten Briskodian Join Date: Sep 2004 Location: Bonn, Germany Posts: 1,209 Members Car: Octavia 1.9TDi Thanks: 0 Thanked 0 Times in 0 Posts	I run mine with roundabout 32psi to 33psi .... They did about 8.000miles and they show no unusual wearout . But now they hilbernate in the cellar

16-11-2004, 22:56	#10
inquirer Briskodian Join Date: Oct 2003 Location: Bergen, Norway Posts: 176 Members Car: Ford Escort (after my old Octavia had to be sold) Thanks: 0 Thanked 0 Times in 0 Posts	i had to have 2.6 bar front, 2.4 bar rear, anything lower and i would get uneven wear. Mind you this was in winter -5 to 10 C. This was with 225/45 17". I have noticed that the TDI's are real heavy in front makeing the suspension go real low (TDI engine + sump guard + driver). The rear seems like it has no weight at all. __________________ Christian Last edited by inquirer; 16-11-2004 at 22:59.

17-11-2004, 09:10	#11
Bomber Briskodian Join Date: Sep 2004 Location: Wiltshire Posts: 9 Members Car: Skoda Superb Comfort TDI 130 Thanks: 0 Thanked 0 Times in 0 Posts	Anton Us caravan tuggers have the same problem with older caravans because the information is often not available: One of the specialist mags said that: "In the absence of advice from the caravan or trailer manufacturer, consult Michelin quoting the exact tyre dimensions, (including the Load index) and giving the actual axle load being carried by these tyres," You know the weight of the car and the other information is on the tyres. give it a go. in this case Mitchellin were very helpful

17-11-2004, 14:33	#14
boyced fully boyced. Join Date: Jul 2004 Posts: 2,919 Members Car: Octavia vRS Thanks: 0 Thanked 0 Times in 0 Posts	google calculator! 1 kiloPascal = 0.145037738 pounds per square inch http://www.google.co.uk/search?hl=en...e+Search&meta=

17-11-2004, 14:49	#15
Nigel26 Briskodian Join Date: Nov 2003 Location: Walsall, West Midlands Posts: 2,298 Members Car: Sea Grey Mondeo Titanium X Thanks: 0 Thanked 0 Times in 0 Posts	32psi in all of em, as recommended by my mate at national tyres... he knows his beans as well. __________________ Sea Grey Mondeo Titanium X

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How much air? (Tire pressures)

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