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Tyre Pressure

Tech Talk for Mitsubishi owners.

Moderator: -Scott-

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Tyre Pressure

Post by mccpijs4 »

Just put a new set of 33x12.5x15 BFG MTs on my short wheelbase Pajero.
Was told to run them on the road at 40psi but I reckon this is maybe too hard and will wear the centre faster.
There seems to be a definite roundness to the tread at this pressure. My thoughts were as this is only a SWB Paj and not a heavier Landcruiser or the like, I should be running a bit lower - say 36 or something? Any thoughts?
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Post by mccpijs4 »

As an aside - feels like a brand new car now with the new *balanced* wheels!
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Post by pickle »

Well I wouldn't be running them at 40. Be pretty scary in the wet as well!
Shorty wouldn't be all that heavy so at cold pressure I would be running them around 34. Giving them 3-4 psi extra when they warm up.
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Post by CapnCrunch »

I've have 33x12.5x15 Dunlop M/Ts on my SWB for a few years now and I run them at 35 PSI. It handles well and they're wearing very evenly.
Joe
88 Montero (Pajero) 2.6L 5-speed - dual-locked, low-geared, armored, lifted, lit, rigged for dive... [img]http://www.fivethirty.com/images/blah.gif[/img]
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Post by mccpijs4 »

Yeah that sounds good - will change them this evening and see how I go.
Cheers
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Post by -Scott- »

Using the 4psi rule, I think 36psi is about right for my Paj. I was running 38psi for a while (dreaming about better fuel economy :lol: ) and the centres were definitely wearing more. So I'm back to 36 now.

With S/Ts, MT/Rs and STTs I've never had a problem in the wet - with the STTs, I haven't managed to spin them on wet bitumen when I've tried. The original Yokohamas were a different story...
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Post by j-top paj »

i had mine at 38 i think, but went to 36.
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Re: Tyre Pressure

Post by j-top paj »

mccpijs4 wrote: My thoughts were as this is only a SWB Paj and not a heavier Landcruiser or the like,
you would be supprised how much a shorty actually weighs
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Re: Tyre Pressure

Post by NJV6 »

j-top paj wrote:you would be supprised how much a shorty actually weighs
Yep a fully optioned SWB like mine comes in just shy of 2 ton.

I run my tyres quite tight on the road (38-40) as I have no sway bars and there is alot of sidewall, therefore it is less rolly polly on the road. Tradeoff is the ride is a bit harsher, and probably grip isn't as good on the roadbut I don't push it. The are absolutely hopeless off road at 40psi thou :armsup:

I don't do enough kay's to worry about how they wear (12000km in 3 years) and have not noticed any untoward wearing.
1994 NJ SWB, 3.5, 5 speed manual, 33's, XD9000, 4.9 diffs, Front & Rear ARB's, Safari Snorkel

2008-2009-2010-2011 Pavlova in the shed.
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