Hi,
Ive got a 17"rim with a 40 profile tyre, was just wondering what sort of tyre pressure i should be using, i notice the other day they looked alittle flat and couldnt find any guide on the tyre itself....
Just wondering what pressure the rest of you use ???
tyre pressure
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barfy
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ruchi
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So that we are comparing apples to apples, aside from listing the front and rear pressure, please also state your rim and tyre size (like Teania did 
), and any other information that may be of interest e.g. harsh ride, used to have the pressure lower but....
According to the FTO users manual the standard pressure for all the various wheel / tyre sizes the FTO came with (185/70/14, 195/60/15, 205/50/16) was:
Front: 31-32 PSI
Rear: 27-28 PSI
However, you may want / need to adjust the pressure based on the tyres you have, the rim size, driving style and personal preference.
Being a FWD car, it is advisable to always have a higher pressure at the front.
), and any other information that may be of interest e.g. harsh ride, used to have the pressure lower but....According to the FTO users manual the standard pressure for all the various wheel / tyre sizes the FTO came with (185/70/14, 195/60/15, 205/50/16) was:
Front: 31-32 PSI
Rear: 27-28 PSI
However, you may want / need to adjust the pressure based on the tyres you have, the rim size, driving style and personal preference.
Being a FWD car, it is advisable to always have a higher pressure at the front.
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G1
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this topic has been covered in the past
http://www.ftoaustralia.com/modules.php ... t=pressure
basically, its a tunable aspect of your car, depending on the way you drive and comfort levels you want
http://www.ftoaustralia.com/modules.php ... t=pressure
basically, its a tunable aspect of your car, depending on the way you drive and comfort levels you want
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FTO338
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When i did my driving course (not L or P plates), the instructor told us that, if you want comfort, you follow the psi from manufacturer cause thats the main concern for any car company. But if you want safety then you should put 36psi all round no matter of what size of tyres you use.
The reason been it will give you more contact to the road surface with 36psi & thenfore apart from its safer, it also give you better fuel economy.
In rain you should change it to 34psi, as it will help dispense water from your tyres.
Apparently they got this result from Volvo after they did intensive test on all sort of tyres (size/width).
Quote from my instructor "The factory psi setting will only give you a comfortable death, not saving your life"
The reason been it will give you more contact to the road surface with 36psi & thenfore apart from its safer, it also give you better fuel economy.
In rain you should change it to 34psi, as it will help dispense water from your tyres.
Apparently they got this result from Volvo after they did intensive test on all sort of tyres (size/width).
Quote from my instructor "The factory psi setting will only give you a comfortable death, not saving your life"
DISCLAIMER: The above text is the personal opinion of the author and does not represent the indisputable truth. The author is not responsible for any deaths, injuries or mental illness caused by the above statments.
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ruchi
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I agree with Kev, but as opposed to specific PSI values, as these can differ based on car and wheel / tyre size, the general rule that I was taught was to increase the value by 2-4 PSI for better handling and a further 2-4 PSI (on a temporary basis) if doing something like a track day.
The obvious trade-off of a higher tyre pressure is a harsher ride.
Over-inflating the tyre can be just as dangerous as under-inflation. It can reduce the contact patch, create uneven wear, make the tyre more prone to blowouts etc. It will also reduce the life of your suspension components, as they have to work harder. The maximum inflation value should be listed on the side wall of the tyre, but I reckon you'd have to be nuts to get anywhere near that value.
In general, staying within an 4-8 PSI range of what the manufacturer states is a good balance between enhancing the benefits from the tyre without compromising comfort too much or introducing other issues.
The obvious trade-off of a higher tyre pressure is a harsher ride.
Over-inflating the tyre can be just as dangerous as under-inflation. It can reduce the contact patch, create uneven wear, make the tyre more prone to blowouts etc. It will also reduce the life of your suspension components, as they have to work harder. The maximum inflation value should be listed on the side wall of the tyre, but I reckon you'd have to be nuts to get anywhere near that value.
In general, staying within an 4-8 PSI range of what the manufacturer states is a good balance between enhancing the benefits from the tyre without compromising comfort too much or introducing other issues.
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MADFTO
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*smiles* I'm running 50PSI at the moment =)
Yes, that's not a typo. 50 PSI =)
Was running that on the track . . . did the whole track day at that, and I felt fine =)
Haven't been bothered letting the tyres down, and honestly, I don't want to =) Feels like the car's more stable around corners as the tyre doesn't flex much =)
Anyways, normally I'd run 40PSI straight off the bat, but then again I'm always using Z rated tyres =) Go figure =)
Yes, that's not a typo. 50 PSI =)
Was running that on the track . . . did the whole track day at that, and I felt fine =)
Haven't been bothered letting the tyres down, and honestly, I don't want to =) Feels like the car's more stable around corners as the tyre doesn't flex much =)
Anyways, normally I'd run 40PSI straight off the bat, but then again I'm always using Z rated tyres =) Go figure =)