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Philbilly
Joined: Wed May 11, 2011 11:41 pm Posts: 84 Location: SWR
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 Posted: Sat Jul 02, 2011 1:37 pm |
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For a Vitara, what tyre pressure you guys are running in your MT tyres? I realise this is a little open ended as there are so many different terains etc, but for just general driving around the streets and a short offroad stint, what pressure would you run?
Cheers,
Phil
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alien
Joined: Wed Mar 24, 2010 10:30 pm Posts: 16343 Location: Perth
Vehicle: '92 Sierra, 1.6efi, SPOA, 31s.
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Posted: Sat Jul 02, 2011 1:57 pm |
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what size?
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FullyZooked
az supporter
Joined: Mon Oct 25, 2010 9:01 am Posts: 1009 Location: Bendigo
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Posted: Sat Jul 02, 2011 2:07 pm |
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In my g16a powered Vit with maxxis bighorns 235/75's I run 40psi for normal road driving. I only run this when doing highway driving or I run out of boondi with any lower pressures.
Offroad where the car spends 80% of it's life is between 8-15psi depending on terrain.
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Built Suzuki's shall reign Victorious.
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alien
Joined: Wed Mar 24, 2010 10:30 pm Posts: 16343 Location: Perth
Vehicle: '92 Sierra, 1.6efi, SPOA, 31s.
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Posted: Sat Jul 02, 2011 2:26 pm |
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40PSI!!!!!! WTF?!
i run 31s on my sierra - 26psi front and 22psi rear (this is with Kumho KL71)... with BFG KM2 i run 24psi front and 20 rear... with simex ET i ran 20 front and 18 rear.
offroad the KL71s get 9psi, the KM2 get 8psi and the simexs got as low as i dared which was 6psi.
theres a tyre placard inside the drivers door (sometimes) - this should give you a PSI for standard sized tyres, and is a good place to start no matter what size you're running.
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mongrelzook
Joined: Mon Jun 27, 2011 11:55 am Posts: 144 Location: brisbane
Vehicle: 96 sj70+80 tintop sierra
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Posted: Sat Jul 02, 2011 2:30 pm |
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I was running 32psi all round and thought was bit rough on 31s put it down to about 26 and seems ok. Can understand winding it up abit for highway thought 40 is bit much.
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MacDaddy
az supporter
Joined: Thu Mar 26, 2009 10:30 pm Posts: 10453 Location: Perth, Australia
Vehicle: Jeep
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Posted: Sat Jul 02, 2011 2:31 pm |
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alien wrote: 40PSI!!!!!! WTF?!
i run 31s on my sierra - 26psi front and 22psi rear (this is with Kumho KL71)... with BFG KM2 i run 24psi front and 20 rear... with simex ET i ran 20 front and 18 rear.
offroad the KL71s get 9psi, the KM2 get 8psi and the simexs got as low as i dared which was 6psi.
theres a tyre placard inside the drivers door (sometimes) - this should give you a PSI for standard sized tyres, and is a good place to start no matter what size you're running.
Yep, check the tyre placard on the door recess, run them at that first and see how you go... from memory i think its 24psi... 
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SierraDan
az supporter
Joined: Fri Feb 04, 2011 10:55 pm Posts: 9348 Location: Newcastle
Vehicle: G13BB Jimny
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Posted: Sat Jul 02, 2011 2:54 pm |
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I run 20-25 on road.
7-10 offroad.
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mlm
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atari4x4
az supporter
Joined: Mon Dec 11, 2006 10:30 pm Posts: 34842 Location: East Radelayed
Vehicle: SV420+SV620 Vitara's
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Posted: Sat Jul 02, 2011 4:46 pm |
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my 31" MT/R's run at 29psi cold on the road & usually between 12-10psi warm off road, will usually have another check in the morning for cold pressures if doing an overnighter/weekender.
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You're just hating because you don't understand
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Brett
az supporter
Joined: Tue May 27, 2008 11:30 pm Posts: 1791 Location: Central coast NSW
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Posted: Sat Jul 02, 2011 8:48 pm |
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31x11.5 claw on a 7 inch rim on a 1.6 4 door vitara.
on road 30 -34
light track work 20
hard tracks/ beach work 6- 12.
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royce
omnipotent being
Joined: Sun Jun 11, 2006 11:30 pm Posts: 17216 Location: Pluto
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Posted: Sat Jul 02, 2011 9:59 pm |
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I still cant believe people over inflate their tyres so much
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shep
Joined: Thu Mar 29, 2007 11:30 pm Posts: 14498 Location: Here there everywhere
Vehicle: A manly awesome man jimny
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Posted: Sat Jul 02, 2011 10:12 pm |
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royce wrote: I still cant believe people over inflate their tyres so much
dont they ever look at there tyre placards? i would hate to have to stop in a hurry
if driving a suzuki that has 40psi in the tyres. 
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JEEPJEEPJEEPJEEPJEEPJEEPJEEPJEEPJEEP
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SuziBlu
Joined: Mon Sep 14, 2009 11:30 pm Posts: 4268 Location: Eyre Peninsula
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Posted: Sat Jul 02, 2011 11:08 pm |
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40 is a pretty terrifying pressure imo in a little light zook. even up 30ish is frightful.
I run claws, 31s at 22 up front and 20 rears, thats in me lwb maruti.
Any more and its getting to harsh on the blacktop, and on the dirt roads, even that is a bit high.
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Bad decisions make good stories.
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boostedbrick
az supporter
Joined: Tue Jun 29, 2010 7:44 am Posts: 2003 Location: Brisbane
Vehicle: 2018 DMAX
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Posted: Sat Jul 02, 2011 11:12 pm |
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shep wrote: royce wrote: I still cant believe people over inflate their tyres so much dont they ever look at there tyre placards? i would hate to have to stop in a hurry if driving a suzuki that has 40psi in the tyres. The tyre wear with 2inchs of tread on the road would be awesome...
MT117 extremes, 19 all around
Goodyear wranglers 22 all around.
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ollies
az supporter
Joined: Wed Oct 13, 2010 8:42 pm Posts: 208 Location: pakenham
Vehicle: vitara
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Posted: Sat Jul 02, 2011 11:18 pm |
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235/75/15, federal couragias, i run 30psi on road and 15psi off, on a lwb vit.
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smiffkid
az supporter
Joined: Fri Aug 13, 2010 12:55 pm Posts: 3266 Location: perth wa
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Posted: Sat Jul 02, 2011 11:30 pm |
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run 25 all round in my 31s, both my xterrains and claws,
dont even run 40 in nissans or toyotas, normally between 32 and 34
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dodgy brothers mechanical
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FullyZooked
az supporter
Joined: Mon Oct 25, 2010 9:01 am Posts: 1009 Location: Bendigo
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Posted: Sat Jul 02, 2011 11:39 pm |
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shep wrote: royce wrote: I still cant believe people over inflate their tyres so much dont they ever look at there tyre placards? i would hate to have to stop in a hurry if driving a suzuki that has 40psi in the tyres. I will give 30 psi a go today as we have a 4x4 run out of town.
As for running higher pressures I think I stated why, but mind you i'll give 25-32 for on road a go.
So much anger this morning geez...
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Philbilly
Joined: Wed May 11, 2011 11:41 pm Posts: 84 Location: SWR
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Posted: Sun Jul 03, 2011 12:02 am |
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Thanks everyone for the info 
alien wrote: what size?
235/75/15 mate.
I'd read on other forums about these heavy (high) tyre pressures, and I know from running around in my fuel guzzling Jeep that 40 pounds would near throw me out the front window- or at least compress a few disk in my back...
I was hoping to hear around 20 lb was right, as I'm a lazy bugger and I'd like to drive straight from the road onto the sand with no adjustment. Though I know a lower setting again would be better for the beach.
So at say 20 lb, would road ware be pretty even? Or is it wiser to opt for 25 lb or so?
I plan to rotate them every 10,000 kays or so.
Cheers,
Phil
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alien
Joined: Wed Mar 24, 2010 10:30 pm Posts: 16343 Location: Perth
Vehicle: '92 Sierra, 1.6efi, SPOA, 31s.
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Posted: Sun Jul 03, 2011 12:39 am |
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you need to test it... drop pressure and then roll over some talcum powder on the driveway to see how much tyre is contacting the road... i usually have about 1" of the tread face each side not touching and this proves to be right for the 4psi rule (after a highway drive they go up 4psi).
the softer you go the more wallowy it will feel in corners too, as the sidewalls will flex more.
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Scrawny
I live here!
Joined: Tue Jan 29, 2008 10:30 pm Posts: 10528 Location: Brissie
Vehicle: Popemobile
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Posted: Sun Jul 03, 2011 1:40 am |
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I run 40psi in my Prado. I ran 20psi in my Sierra on road and 10 offroad. I run 50psi in my work van (current Hiace)
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lump_a_charcoal
az supporter
Joined: Wed Feb 28, 2007 10:30 pm Posts: 4454 Location: Botany, NSW
Vehicle: MY2019 Jimny
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Posted: Sun Jul 03, 2011 2:44 am |
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I used to run 24psi on road, and 4-8 off road.
31 inch baja claws.
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MacDaddy
az supporter
Joined: Thu Mar 26, 2009 10:30 pm Posts: 10453 Location: Perth, Australia
Vehicle: Jeep
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Posted: Sun Jul 03, 2011 4:58 am |
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Philbilly wrote: Thanks everyone for the info alien wrote: what size? 235/75/15 mate. I'd read on other forums about these heavy (high) tyre pressures, and I know from running around in my fuel guzzling Jeep that 40 pounds would near throw me out the front window- or at least compress a few disk in my back... I was hoping to hear around 20 lb was right, as I'm a lazy bugger and I'd like to drive straight from the road onto the sand with no adjustment. Though I know a lower setting again would be better for the beach. So at say 20 lb, would road ware be pretty even? Or is it wiser to opt for 25 lb or so? I plan to rotate them every 10,000 kays or so. Cheers, Phil Just dont forget, running a tyre under inflated on the road, will build up more heat than normal pressure, and shorten the life of the tyre... i would strongly suggest running the tyre placard pressure for onroad !
Tyre fitters seeem to think that all tyres should have 32psi in them, when i had my AT's fitted, the ride was very harsh, the tyres would skip over rail lines and crab sideways, checked tyre pressure, 32psi... 
Zooks are Light, they dont need anything over 25psi ! 
I know he might be a bit tired of repeating himself, but Greg Dixon is the tyre man... 
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