Colt Case Ingersoll Garden Tractors

myerslawnandgarden wrote: ↑Sun May 04, 2025 10:32 pm Just made that point to my daughter when her husband put all of the tires on her Ford Escape to 40# because that's what it said on the sidewall.

Bob

Just tell them that the guys who went to school for at least 4 years and have extensive experience have put a sticker on the door well, saying what the tire pressure should be.

There are very active forums on everything off-roading. Tire pressure on there is almost like which oil here. The tire makers do agree with the formula used by off-roaders that need street pressure and off-road pressure. The street pressure is pure math. You use the stock tires and the tire's maximum load at whatever pressure, and that gives you the percentage of the load rating the factory wanted. Then you have to use two calculations for the very stiffer and higher load tires to first reduce the load rating to the equivalent of the original street tires, and then take that and reduce the pressure to get to the load expected by the engineers of the vehicle specs. It usually is something around 16 psi. That makes many guys a bit squeamish, and they usually round up to 20 psi.

On the sand dunes, tire pressure makes a huge difference. Once I went into town with my Ford Excursion, and I aired it back up to 16 psi for the road. The next morning, I wanted to go out on the dunes again, but also knew that we were going to town again. I only lowered it to 12 psi, and I could barely move. So, I had to lower them to 8 psi, which was my normal. The tires were bead-glued, so I did not have to worry much about unseating the tires. Then, on a different trip, in the same truck, it would not go into 4WD. Of course, everything is now just a wire to a computer that goes to the fuse panel to pick up bigger wires and current. My ECM was bad. No 4WD. I wondered if I needed it for just the small hills and the trails. I did not need it. It drove around just fine. That truck was so fun, I added a locker in the rear, and playing in the mud and snow was so fun. I miss having a locker or posi and rear wheel drive.