Now did you actually make this poster ? if so it very well shows the difference
They look fine. I only did it for 6 or 7 days. I would never have done it except a group I wheeled with the first day did it, so I asked. They had been wheelin’ Moab for 14 years so I assumed if it was good enough for them it would work for me. The tires are Cooper STT Pro and have worn pretty evenly. I’ve got 21,000 miles on these. I’m thinking I’ll be up for a new set in another 9,000 miles. Good topic.Sure makes a difference when traction gets sketchy.
Interesting that you've been up to 55 mph aired down. What's the inside of your tires look like? I trashed the lining on a set of tires running the pressure too low one time. But those were street tires, and I wasn't going 55. Our off road tires must be made of sterner stuff.
That's where the process I describe earlier comes into play, at least as far as maximizing the contact patch for the specific vehicle/tire combination is concerned. Whether or not there are optimal pressures for different scenarios is a whole other discussion.I remember an article in JP mag about this and they were using ink on cardboard. They came up with some "optimum" pressure around 15 psi IIRC. their "science" was with one Jeep on one tire type. I find it hard to believe there is only one ideal offroad pressure. I had a CJ-5 on 35's some 30 years ago and know for a fact they wouldn't bulge a bit at 15 psi. Ran them around 7-8. Have yet to really work my TJ offroad much yet, but the Coopers on my old Nissan PU were happy around 12 psi.
Dont have a street pressure but here are 33s at 8 psiIt would be cool if somebody could post up pics of a decent sized tire wrapping around an obstacle when aired down vs the same tire at street pressure on the same obstacle.