tyre pressure 89 swb vit
Posted: Tue Sep 06, 2005 7:48 pm
what is the correct tyre pressure for 235/75R15 on a swb 89 vitara
on road?
off road?
beach?
rocks?
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tyre pressure 89 swb vit
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Posted: Tue Sep 06, 2005 10:07 pm
Posted: Tue Sep 06, 2005 10:21 pm
Hi,
On road you could try the 4psi rule. The tyre should be 4si higher hot than when it is cold.
ie. Pump them up to 35psi cold, drive for 15 minutes on the highway and test them again, they should be 39psi now. If they are more than 4psi higher when warm they were too soft.
Off road, depends on conditions, grip, terrain etc.
I hope that helps.
Cheers
Clive
On road you could try the 4psi rule. The tyre should be 4si higher hot than when it is cold.
ie. Pump them up to 35psi cold, drive for 15 minutes on the highway and test them again, they should be 39psi now. If they are more than 4psi higher when warm they were too soft.
Off road, depends on conditions, grip, terrain etc.
I hope that helps.
Cheers
Clive
Posted: Tue Sep 06, 2005 11:10 pm
35psi!!!?!?!?!?!?!?! better buy a kidney belt =)
i ran the 215/75's on my zuk at 25psi on road, 20psi in winter (more grip).
mud/rock/sand - i go as far as i can with them hard - most times i dont get stuck at all and dont have to re-inflate tyres on the way out (a big plus!)... if i get stuck on sand - ill take em to 10psi and try again, if still stuck ive gone as low as 5psi but you want to pump em back up after that cos they can roll off the rim!
Airing down on rock can give more traction - but also opens the sidewalls up to a world of pain.
Airing down on mud/water can be handy if you're running large tyres as theyll tend to float =) otherwise, harder the better so it can dig in and get grip.
i ran the 215/75's on my zuk at 25psi on road, 20psi in winter (more grip).
mud/rock/sand - i go as far as i can with them hard - most times i dont get stuck at all and dont have to re-inflate tyres on the way out (a big plus!)... if i get stuck on sand - ill take em to 10psi and try again, if still stuck ive gone as low as 5psi but you want to pump em back up after that cos they can roll off the rim!
Airing down on rock can give more traction - but also opens the sidewalls up to a world of pain.
Airing down on mud/water can be handy if you're running large tyres as theyll tend to float =) otherwise, harder the better so it can dig in and get grip.
Posted: Tue Sep 06, 2005 11:28 pm
the tyre placard on the door says 215/75r15 23PSI for road use.
on road with 31's i run nothing over 27psi
on road with 31's i run nothing over 27psi
Posted: Wed Sep 07, 2005 6:56 am
thanks guys i am more referring to on road
cheers sako.............
cheers sako.............
Posted: Wed Sep 07, 2005 7:21 am
Hey RicRic wrote:the tyre placard on the door says 215/75r15 23PSI for road use.
on road with 31's i run nothing over 27psi
I have been running 40psi in my 30", that's what I was told to run when I brought the tyres.
27psi is low!
I must say 40psi the Vit drives like a drunken sailor.
So I could drop 10psi ok??
Posted: Wed Sep 07, 2005 9:05 am
Holy Moly! 40psi!?!?
Just cos the tyre is rated to that, doesnt mean you should run it there =) A lot of tyre places pump them up to the recommended pressure and its up to you to let them down to the right level.
Just cos the tyre is rated to that, doesnt mean you should run it there =) A lot of tyre places pump them up to the recommended pressure and its up to you to let them down to the right level.
fdsafds
Posted: Wed Sep 07, 2005 9:21 am
on road, depending, 20-30 psi. maybe 25 psi is ok for a 235.
i ran 31"s at 25 on road, and 18 off road.
my 33"s are at 25ish on road, and about 10-15 ish off road.
also depends on if u are always carrying loads, and if you want a comfy ride, or more fuel economy. if ur goinf on the free ways everyday, for longish times, then having them up higher is probably better.
i ran 31"s at 25 on road, and 18 off road.
my 33"s are at 25ish on road, and about 10-15 ish off road.
also depends on if u are always carrying loads, and if you want a comfy ride, or more fuel economy. if ur goinf on the free ways everyday, for longish times, then having them up higher is probably better.
Posted: Wed Sep 07, 2005 9:34 am
suzuki boy, you shouldn't run them over around 30PSI.. 30 is heaps.. offroad you can go down to around 12 safely, everyone has different opinions about this though..
Ric
Ric
Posted: Wed Sep 07, 2005 9:35 am
i put talcom power on the driveway and rolled over it...
the tyre pressure was "correct" when the whole tyre tread was getting talc on it... like someone else said - the pressure goes up slightly when they warm up too.
Method works for me.
the tyre pressure was "correct" when the whole tyre tread was getting talc on it... like someone else said - the pressure goes up slightly when they warm up too.
Method works for me.
Posted: Wed Sep 07, 2005 10:02 am
Thanks for that will deflate them down to 25-30psi and feel the difference.
Will have to change the Staun deflators I just brought, have them set to 25psi.
Will have to change the Staun deflators I just brought, have them set to 25psi.
Posted: Wed Sep 07, 2005 10:47 am
Tyre fitters have a lot to anwser for,
they put 35 PSI in all 4x4 tyres, patrol or sierra, they don't see a diference.
many times I have been on trips with guys that swore black and blue that they HAD to run 35PSI in their 1000KG sierra because the guy they bought the tyres off said that was the correct pressure.
All you have to do is look at the tyre placard (if it is still fitted) to give you a hint that they are full of shit!!
on a recent snow trip one guy with a Jimny was airing up to go home,
and as he seemed to be taking a long time, I asked him what pressure he was running,
he said the tyre fitter told him to run 38PSI all the time but if he was carying a load, wack another 5 PSI in
,
this may be good advice if it was a land rover 110 or an F350 but not on a zook.
there was no way I could convince this guy that 38 was crazy to start with and that the "load" in his car was about 120KG (or one large pasenger)and he should be running about 25PSI,
he drove home (3 hours) bouncing and jaring all the way home ( but he would have got good fuel economy figures).
Peter.
they put 35 PSI in all 4x4 tyres, patrol or sierra, they don't see a diference.
many times I have been on trips with guys that swore black and blue that they HAD to run 35PSI in their 1000KG sierra because the guy they bought the tyres off said that was the correct pressure.
All you have to do is look at the tyre placard (if it is still fitted) to give you a hint that they are full of shit!!
on a recent snow trip one guy with a Jimny was airing up to go home,
and as he seemed to be taking a long time, I asked him what pressure he was running,
he said the tyre fitter told him to run 38PSI all the time but if he was carying a load, wack another 5 PSI in
, this may be good advice if it was a land rover 110 or an F350 but not on a zook.
there was no way I could convince this guy that 38 was crazy to start with and that the "load" in his car was about 120KG (or one large pasenger)and he should be running about 25PSI,
he drove home (3 hours) bouncing and jaring all the way home ( but he would have got good fuel economy figures).
Peter.
Posted: Wed Sep 07, 2005 1:41 pm
Was wondering why the ARB guy looked at me strange when he asked me what psi I wanted my tyre deflators at, then asked what tyre pressure I run with another strange look. 