I realize this question has likely been asked a billion times, so I'll preface with stating that I did try to search and do some research.
This post proved extremely useful. Tire master, wow.
So I'm running BFG All-Terrain KO2s (LT 265/75/R16). So 32's on stock 7" wide rims. Looking on the BFG website it states: 3,415 lbs at 80 psi.
Doing TJ's math: 35% of GVWR is 1820, then we take 1820/3415=53%, and 53% of 80psi is 43psi
43 seems crazy high, no? Do I have the wrong tires for the truck?
My main question is around airing down for off-road. I've seen numerous posts stating that running at 15 psi is good for muddy off road conditions. Is the minimum (safe) off-road psi a function of your highway PSI? I'm assuming that someone who has to run 43psi on the road would have a different off-road pressure compared to someone running 30psi on the road?
I have a Viair 400P portable compressor for airing up, but no on-board air. I also have no clue how to reset a tire if the beat came off - so I'm very interested to ensure that doesn't happen when I'm in the middle of nowhere! Hoping to get a sense of a 'safe' minimum for airing down my BFGs for getting maximum traction off-road.
To add some context to my question, I was exploring deep in the Caribou range this past weekend and after many kilometres of driving remote roads came across a set of switchbacks heading up to an alpine ridge - it was uber steep, a full on V-groove eroded in the road, exposed cliff on the side, and some rocks/gravel in the groove and sides of the road to make things extra exciting. I turned around, not wanting to risk it, but was curious how low I can air down to try and crawl up it...
This post proved extremely useful. Tire master, wow.
So I'm running BFG All-Terrain KO2s (LT 265/75/R16). So 32's on stock 7" wide rims. Looking on the BFG website it states: 3,415 lbs at 80 psi.
Doing TJ's math: 35% of GVWR is 1820, then we take 1820/3415=53%, and 53% of 80psi is 43psi
43 seems crazy high, no? Do I have the wrong tires for the truck?
My main question is around airing down for off-road. I've seen numerous posts stating that running at 15 psi is good for muddy off road conditions. Is the minimum (safe) off-road psi a function of your highway PSI? I'm assuming that someone who has to run 43psi on the road would have a different off-road pressure compared to someone running 30psi on the road?
I have a Viair 400P portable compressor for airing up, but no on-board air. I also have no clue how to reset a tire if the beat came off - so I'm very interested to ensure that doesn't happen when I'm in the middle of nowhere! Hoping to get a sense of a 'safe' minimum for airing down my BFGs for getting maximum traction off-road.
To add some context to my question, I was exploring deep in the Caribou range this past weekend and after many kilometres of driving remote roads came across a set of switchbacks heading up to an alpine ridge - it was uber steep, a full on V-groove eroded in the road, exposed cliff on the side, and some rocks/gravel in the groove and sides of the road to make things extra exciting. I turned around, not wanting to risk it, but was curious how low I can air down to try and crawl up it...