Air Pressure

My ”other” brand said 35 PSI on the sidewall. I thought this seemed too much until I trusted it it and found out they wore better and lasted longer. on the trail I ran them at 4 PSI 😛

Stock was LT245/75R16 which I believe was a D or E rated sidewall, way too stiff for a comfortable ride on a light Jeep. Door sticker shows 33 PSI, I'd suggest trying 28 PSI, could always try the chalk test to see how the tire contact patch is.

Run a chalk test. Draw a line of chalk across the tread. Drive a few hundred yards straight and see how it was removed. If in the middle only, your pressure is too high, if on the outside only your pressure is too low. if wear of the line is equal you are at a good pressure. I normally start at 24 PSI and add 2 lbs at a time. You should get a range of good pressure, choose a the middle of the range.

I'll try the chalk test, or maybe some paint, since I don't have chalk.

When I needed to stretch out gas mileage I would run 32-35 psi.

285 75 16 BFG AT's 10 ply 24psi per tire is what I run. 2006 Rubicon.

Wow, so I've been running BFG KO2 tires at 36psi since that's what the dash displays.

39-40lbs for highway and 8lbs off road for the wrangler (mud grapplers, 65 is max] and the 4 runner (cooper ATs, 44 is max) tire ratting, not the vehicle. neither one is stock

turtlle said:

39-40lbs for highway and 8lbs off road for the wrangler (mud grapplers, 65 is max] and the 4 runner (cooper ATs, 44 is max) tire ratting, not the vehicle. neither one is stock

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I'm not an expert, but from what Jeep and tire makers have told me, there is no tire pressure rating, other than the max pressure, and that tire pressure is defined by the label in your door pillar.

donmontalvo said:

I'm not an expert, but from what Jeep and tire makers have told me, there is no tire rating, other than the max pressure, and that tire pressure is defined by the label in your door pillar.

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Tire inflation is dictated by the load rating on the sidewall of the tire. If you change brands or models, the Inflation will change.

Airing down my Goodyear MTRs to 4lbs. was just my preference that worked on my cheep steel wheels.

weight in added skids, brakes, bumpers, steering and other accessories have effect on 33lb OEM 245/75-16 ratting. I'm on mountain roads with 35s every day also, depends on what works for you.

I agree, everyone has to figure out what works for them for a given scenario, and whether they have bead locks or not.

I’ve gone down as low as 12 on easier terrain, where clearance isn’t so important. Whereas I go down to 15-16 if I need to preserve clearance.

FWIw my wheels are ICON Rebound Pro (newer outer bead lock design).

I roll on roads at 36, my tread seems to wear evenly. BFG KO2 315/70R17.

I've been Jeepin and wheeling since the late 70's, I used to always run my tires at 35 psi, till I read an article about using chalk. I played with that for a while with my CJ's and and pretty much settled on 24 to 26 psi for good driving numbers.

where we were wheeling it was more mud than rocks so I just used the same psi. Eastern red clay mud ain't no playground or walk in the park!!!!!

I had been running at 35 psi and the ride was rough , I bought a white chalk marking pen and Took pressure down till there was even wear on the tread , ended up around 24psi, rides much better and I have a great contact pattern now