Tire pressure when it's cold

They have them on our trailers. The fittings are enough of a pain that I don't bother pulling them to check the tire pressure. OTOH a tire that is flat can be aired-up with them by simply rolling around a trailer yard... assuming it's still on the rim, and whatever caused the tire to deflate isn't too serious.

 

Actually, 75 PSI is what Michelin recommends for 34,000# on a dual tire set up. I think they know something about tires.

http://www.michelintruck.com/michelintruck/tires-retreads/tireInfo.do?tread=XDA ENERGY

Or LESS:

http://www.michelintruck.com/michelintruck/tires-retreads/tireInfo.do?tread=XDN2

 

im running the system on my trailer, and feel it was money well spent. i have a thread somewhere from when i had the system installed.

the system has been working great so far

 

http://www.thetruckersreport.com/tr...tor/208502-meritor-tire-inflation-system.html

i found the thread for you

 

low pro rubber needs a bit more air than tall but I run 75 psi in my drives and 85 in steers but 105 in my low pro spread on the trailer since I dump air on rear sometimes it briefly leaves fwd axle overloaded.

Never blew a tire since the truck was new in 1995. Good tread wear all around. I could get away with 70 in the drives.

That settles it

 

Yea me too. 80 PSI on drives and trailer and wearing perfectly. That's 80 in a southern state which is about 75 by the time I get home.