BF Goodrich Tyre Pressure Recommendations - Defender Source
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Old November 2nd, 2008, 12:25 PM
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Carl Jonsson
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BF Goodrich Tyre Pressure Recommendations

What tyre pressure would you recommend on a set of BF Goodrich AT (Tubeless) on Tornado 5 spoke wheels? On and Off Road Recommendations? It's the stock set up.The tyres say a max load of 65 PSI but I assume I ought to run something quite a bit less than that. Thanks!
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Old November 2nd, 2008, 09:19 PM
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Stephan Laputka
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off road id say 12-15. On road is tough. I mean on my truck I do 36 up front and 38 in the back. I adjust it to tune the handling on the truck. Start them at 38 and bleed air down from there. Unless you want the best possible mpg then i guess you can just inflate them to the max psi but I dont know what that's gonna be like.
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Old November 2nd, 2008, 09:46 PM
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Chris Snyder
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Old November 4th, 2008, 09:54 PM
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Doug Crowther
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I run the BFG Mt KM 2's and air down to 18 for offroad in a heavily rigged 110. The chalk trick in a parking lot will tell you what the correct pressure is for a given tire on your particular truck. Pendy outlined the process in a thread about how to get the max mpg out of a tdi.
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Old November 5th, 2008, 11:25 AM
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For on-road use I have been working to a formula I heard yonks ago, which has served me well. Can't remember where I heard it - no surprise there. I measure tyre pressure when cold, then re-measure after a run long enough to bring the tyres up to 'operating' temp. I'm looking for a 4 psi increase. Less = over pressurised tyre, more = under pressurised tyre. Intuitively, this makes sense to me. Apparantly, the 4 psi increase is largely independent of load, so for any given load the tyre pressure that results in a 4 psi increase is correct. I have never run at max pressures - 28psi front and 32 rear, cold, on 235/85's generally works for me with an empty wagon.
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Old November 5th, 2008, 11:43 AM
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Charles Galpin
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Interesting. So what's cold? Surely this is affected by ambient temperature?
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