Tyre pressures
Submitted: Friday, May 02, 2003 at 16:39
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Member - Martyn
Age old discussion, what's the concencus out there about the tyre pressures, I have a 92 GQ with the little wheels 31.5 X 10R X 15 BFG All -Terrains, I normally run around the 38 psi mark, my mate has a 96 GQ and has the 265 X 75R X 16's BFG All-Terrains and he runs around the 50 psi mark. He seems to have a lot more punctures when out in the bush, I think he's running the pressures a tad to high, because of that we've decided to go out to the audience, my phone a friend option didn't cut the mustard, I've had I realise different pressure for different applications what's the feeling? Keep the shiny side up
Reply By: GPA - Friday, May 02, 2003 at 18:41
Friday, May 02, 2003 at 18:41
91 GQ SWB 31x10.5x15 Yokohama Geolandar's
Normally I run 32psi front, 34psi back - up to 36/38 loaded for hols. Tracks at 24/26psi and beach at 18psi (all round) and occassionally down to 12psi. So far no punctures and no tyre damage (touching wood).
The previous owner towed a 17ft boat, and had them at 40/42 - however there are clear signs that they were over inflated as the centre of the tread is noticeably worn.
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Reply By: zigglemeister - Friday, May 02, 2003 at 23:11
Friday, May 02, 2003 at 23:11
Something people don't always consider is that the more pressure you have in your tyres, the more vibration you are transferring to your car on uneven surfaces. If you're running on bitumen, not a problem, but if you're doing a heap of k's on corrugations, it is worth thinking about. Even if choosing lower pressures means you do get a few less k's on your tyres, you're potentially saving wear on steering components, shockies, etc, etc, and reducing the chance of stress cracking in the chassis and body. Personally I'd never go near 50 psi - your 38 is about as high as I've ever run. In the bush I'd run lower - on the 60 series I used to have, I would run low 20's, and I never had a flat.
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Reply By: Truckster (Vic) - Friday, May 02, 2003 at 23:37
Friday, May 02, 2003 at 23:37
Another thing to consider, is how much crap does each car carry..
One has winch, wich bar, rear storage, fridge, recovery gear etc,is going to warrant higher pressures.
Your magte can sort this out real easy ... try lower pressures a few weeks in a row around same terrain he gets flats on now regularly, and there you go...
YMMV
AnswerID:
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Reply By: Slammin - Saturday, May 03, 2003 at 00:06
Saturday, May 03, 2003 at 00:06
This threads getting long but I'll throw my 2c in. I drive 75% dirt and the thing I look at is the profile, you need a bit of a bulge but not so much that the sidewall is in easy contact with protrusions, keep that in mind and the load doesn't matter.
As above remember the tyres are the 1st part of the
suspension. I can judge by eye and find I'm right on the recco press. Tubes are important because they help prevent star punctures.
The motor sport where you need most grip, dirt biking I run 15psi in the front and 12 in the back!
AnswerID:
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