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Author Topic: Tyre pressures  (Read 1486 times)

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miggy

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Tyre pressures
« on: 25 April 2007, 17:29:02 »
Can anyone help, I have put a set of 18" brushed alloy wheels on the omega, looks fantastic, can anyone advise on what tyre pressures I should run at.
Tyre size 235 x 40 x 18
car:- 2002, 2.2 DTI, GLS

Pete [smiley=dankk2.gif]
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Dazzler

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Re: Tyre pressures
« Reply #1 on: 25 April 2007, 17:54:31 »
Pressure is usually higher on low profiles. I run my 18s at about 40psi, but i also drive it quite hard, ;D so you may want to run at about 36-38psi. Hope this helps.
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Kevin Wood

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Re: Tyre pressures
« Reply #2 on: 25 April 2007, 18:59:04 »
Pressure specified with the standard 235/45/17's on my MV6 is 2.1 bar (30.5) front, 2.3 bar rear (33)  or 2.8 (40.5) / 3.3 (48) with full load. This appears to apply to the Y22DTH engine too.

Those tyres will have pretty much the same contact patch on the ground so I'd say they'd be a good starting point.

Watch the tyre wear and adjust as necessary. Wear on both edges indicates insufficient pressure. Wear in the centre indicates too much.

Kevin
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Kevin Wood

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Re: Tyre pressures
« Reply #3 on: 25 April 2007, 19:02:41 »
Ignore the last post. I was looking at estates  ::)

Saloon pressure is 2.2 (32) all round light load and 2.7 (39) Front / 3.1 (45) Rear fully laden.

Kevin
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miggy

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Re: Tyre pressures
« Reply #4 on: 25 April 2007, 19:02:53 »
Thanks for that, I will try the pressures and monitor the wear.
Pete [smiley=dankk2.gif]
Quote
Pressure specified with the standard 235/45/17's on my MV6 is 2.1 bar (30.5) front, 2.3 bar rear (33)  or 2.8 (40.5) / 3.3 (48) with full load. This appears to apply to the Y22DTH engine too.

Those tyres will have pretty much the same contact patch on the ground so I'd say they'd be a good starting point.

Watch the tyre wear and adjust as necessary. Wear on both edges indicates insufficient pressure. Wear in the centre indicates too much.

Kevin
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Kevin Wood

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Re: Tyre pressures
« Reply #5 on: 25 April 2007, 19:04:00 »
See my updated post first!  :)

Kevin
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miggy

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Re: Tyre pressures
« Reply #6 on: 25 April 2007, 19:04:31 »
ok, i will try the latter

Pete
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Ignore the last post. I was looking at estates  ::)

Saloon pressure is 2.2 (32) all round light load and 2.7 (39) Front / 3.1 (45) Rear fully laden.

Kevin
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TheBoy

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Re: Tyre pressures
« Reply #7 on: 25 April 2007, 21:10:37 »
My MV6 (235/45ZR17) I run at 35(F)/32(R) after spending a year messing with pressures.  May not work for you though...
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