Sorry, but the 42 psi cold spec is for a reason. Even std. range plus Model3's are heavy because of the weight of the battery pack. Going all the way down to 34 psi causes a dramatic increase in sidewall deflection even in a straight line, which dramatically increases internal friction between the internal belts of the tires. This will cause your tires to self-destruct when you really don't want them to. It's primarily a summer problem because of the heat---you can get away with it in the winter. People often believe that to much pressure can cause a tire to shred and come apart (or blow-up) in 100 degree heat at 80 mph on the freeway, but the exact opposite is true. That's why you always check your tire pressure when they are dead cold. Put in 42 psi first thing in the morning when it's 60 degrees out and let the internal pressure rise to wherever is wants as the outside temp increases to 110 on the way to Yosemite. It will keep you, your tires, and your beautifully crafted new Tesla in one piece. Have you ever seen a Mercedes on the side of the freeway during the summer with a disintegrated rear tire? It's because Mercedes are very heavy cars and their drivers are notorious for not checking their tire pressure. The reason is always low pressure in that tire. I've even had a tire guy refuse to fill my space-saver tire to the required spec of 65 psi in the afternoon of a 108 degree day (love that global warming). He said he's not allowed to fill it beyond 50 psi in the summer because his boss doesn't want it to blow up. He was wrong for two reasons; first, he was checking the psi in the afternoon when the tire was warm, so he actually needed to add MORE than 65 psi; second, added tire pressure means LESS internal friction and less chance of a failure. Again, lower tire pressure (particularly on a hot day) means more internal friction and a far greater chance for a tire failure. The physics of it all will keep you, your family and your overloaded car on a nice summer vacation drive alive. I need a smiley face here!
