I was curious if any of the serious "hypermilers" go higher then the tire sidewall of 44 PSI. I currently do 44 front 42 rear as recommended my so many. And also if anyone does go over 44 what pressure did you get to and decided to back it off a bit.
At the risk of serious flaming, I will say that I pulled out of the dealer's lot, crossed the street to an air pump, and pumped the Integrity's to 60 psi and they have never been lower than that since. That was 5/19/07 and just shy of 15K miles ago. They have actually been at 70 psi for about the last 10K miles. I'm not planning on backing them off but, I have found that going past 70 doesn't seem to bring any more improvement. They have been as high as 80 psi for several days.
Heres an interesting question: Would you pump up a tire that has been plugged (due to a nail) up to 60psi?
If any of you "higher than sidewall" pressure folks would please go to the trouble of making some detailed tread wear measurements? There is a "myth" that over-inflated tires will show excessive center tread wear, and I think that in the case of radial tires, this needs to get busted. A $20 (Asian imput) digital caliper/depth gauge makes the job very fast and accurate, BRW.
60/58 here Tires wear is even so far but i only have about 2k miles at this pressure. Has been over 50psi since last fall though. On wide tires over inflation wear is very noticible. I believe the tires width plays a large role in whether or not a tire will show wear from under or over inflation. Narrow tires just don't have much surface area. *shrug*
I'll do that for you ... and me. I've got about 11K miles on mine now. A $5 manual gauge should suffice though, don't you think? I never had any reason to question its accuracy when I was in the tire business.
Though it is far from scientific, when I had to have my tire repaired, I took Priapus to Sears. They did a complete tire inspection of all four tires. All were over-inflated and had been for more than a year. According to their checks, there was no ill wear to the tires. They check multiple spots per tire: middle, inside edge, outside edge.
