| Author |
Message |
    
Neil
| | Posted on Thursday, September 26, 2002 - 07:09 pm: | 
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Hi all,
just picked up a set of 245/75-16 BFG All-Terrain T/A KOs Christ, what a mouthful!!
My question is on PSI level, do you follow the side wall numbers, LR manual numbers, although these are for different tires or none of the above and I'm just being too bloody anal?
Note: what would it be for the HWY VS the trail
Thanks
Neil
01 DII |
Erik G. Burrows (Erik)
| | Posted on Thursday, September 26, 2002 - 07:36 pm: |
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Neil,
I use 38 front, and 45 rear, which is higher than most, I think, but with heavy front and rear bumpers, it gives me a good feel, steering, and no cupping from wear. |
Erik G. Burrows (Erik)
| | Posted on Thursday, September 26, 2002 - 07:37 pm: |
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Ooops, I forgot to mention: I'm running 265/75's, instead of 245's. |
neil
| | Posted on Thursday, September 26, 2002 - 08:07 pm: |
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Thanks Eric. That would be for your daily use, how about for trail how much should I air down?
Neil |
Erik G. Burrows (Erik)
| | Posted on Thursday, September 26, 2002 - 10:03 pm: |
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That's quite a bit more subjective, and I'm far from an expert. I've heard of people airing down to 5 PSI for deep sand, but I've never gone lower than about 15. I calculated a long time ago that going from 40ish PSI to 15 for me, doubled my footprint. |
Al Oliveira (Offroaddisco)
| | Posted on Thursday, September 26, 2002 - 11:43 pm: |
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When I was running 245/75's on my Disco II I ran about 38 in the front and 45 in the rear. You'll have to play with it a little to get what feels right. When I moved to 265/75's I run about 28-32 up front and 36-40 in the rear depending on the driving. Less for around the town driving and more for long highway trips. Off road is a different story. |
muskyman
| | Posted on Friday, September 27, 2002 - 08:35 am: |
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al ...you mean this isnt 32lbs in front then? |
James F. Thompson Jaime (Blueboy)
| | Posted on Friday, September 27, 2002 - 09:21 am: |
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Quick method suggestion: "The advise offered was as follows:- Regardless of the size and profile of your tyre, check the pressure of your tyres first thing when they are cold then take your truck out onto the highway and get the tyres well & truely warmed up. Stop and re-check your tyre pressure and the increase in pressure should be 4 psi. If you find the increase in pressure was under 4psi, then your tyres were already over-inflated and if the growth in tyre pressure exceeded 4psi then your tyres were under inflated."
Longer method: "you could put a chalk line across the tread and drive straight for a few
revolutions of the tire. the chalk should were evenly with the correct
pressure. more chalk worn in the center means too much air. chalk worn
near the shoulders mean too little air."
Jaime |
Neil
| | Posted on Friday, September 27, 2002 - 01:34 pm: |
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Thanks all. As always your input was much appreciated.
Neil |
Alan Yim (Alan)
| | Posted on Thursday, October 03, 2002 - 08:40 pm: |
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Cool tips James.  Gonna try that. |
Mark Albrecht
| | Posted on Friday, October 04, 2002 - 04:20 am: |
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I may be beating a dead horse here, but the way I always figured a base line was to 1) figure maximum load for all four tires at full pressure, 2) add up the vehicle weight plus gear and 3) figure the ratio (percentage of total ride weight to maximum tire capacity). That gives you a base line pressure for streat use. Of course, Rover suggests a much higher inflation in the rear -- you may want to factor that in your base line. Then use the seat of your pants and the previously mentioned chalk line test to fine tune the base line tire pressure.
For off road use, I'd stay above 12 - 15 psi unless you have on-board air capacity to re-seat the tire bead. If you do carry air, go lower -- how low depends on the tires, and (for me) if the wheels are alloy or steel (the alloy wheels are so expensive to replace and sometimes you can just pound out the steel ones). |
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