Long time no post.
As the title mentions I have 90,000 miles on my trusty little Max and I am using the original tires the car came with. I mention this because 95% of these miles have been with 51 to 55psi in the tires. I have been told, and told, and HAMMERED at that high PSI is hard on tires. But, I have been running super high PSI in my tires for the nearly 30 yerars of driving and I have always vastly exceeded the average life of my tires.
BTW, I just hit the wear indicators on my tires. I am trying to get 100,000 miles from these tires. But, we shall see. I am not going to keep using them without any tread left. Hopefully I can see 100k from them. That should be around 3.5 months from now.