What tire tread depth gauge You use?

I think you're doing it right just keeping track & I'm interested in your results. With tires at ~3cpm and fuel at ~50cpm, I'd need tires to last 33% longer at 80psi vs 120psi to make it worthwhile to trade fuel economy. That's probably about how much longer they'd last...

Keep in mind that the centers will wear fast at first, but as they wear the shoulders will begin to take on more load so the centers shouldn't continue to wear down as quickly

 

I will put a tire gauge to my trailer tires that have had too much air at 100 lbs & post the difference from the center & the outer of the tires. just last week I had my ole steer tires with about 7/32 on them put on rear of trailer. shop put's 100 lbs in every truck tire no matter what. I forgot to check them, but while empty rolling thru some light sand over concrete, I noticed the center was the only contact with the ground. got home & let out to 85 cold p.s.i. the ride does appear a little smoother. going to gauge every week. may have to adjust 1 or more just due to some may leak more than another, over time. will keep posted.

 

Yeah, used to use chalk to make a decent guess at a tire's ideal inflation. Nowadays I'd probably just use the bbq thermo gun

 

I don't know the brand, but I use a metal one, marked only in 32nds. If you're in the Denver area at any point, I have a couple extras.. I'll gladly give you one.

 

I use the exact same gauge... & it cost Me nothing........

 

Y'all understand that the CVSA out-of-service criteria that the DOT uses to inspect you calls a tire inflated to pressure of 80 psi and below a flat tire?

 

i agree, cranky, but sometimes, you just want to get that last few dollars out of that tire

so it goes from the steers to the drives to the trailer to the dump or retread that grade A casing