Originally Posted by donnyman
Am I confused or what???? All the conflicting information here isn't helping one bit. I have Michelins on my unit none over 3 years old Two blew out both were mounted to the inside of the rear axle on each side. Both took out wiring harnesses, the unit is still in the shop from the last blow out, I try to keep at least 85 psi in my tires. my big concern is what happens to tire pressure when the outside temps is over 100 degrees. I can't afford these blow outs $3000 a pop is killing me. Look at this mess, The wiring harness the size of my arm Looked like a rats Nest wrapped around my axle. This has gotta stop. DONNY.... Oh yea! the tread from the tire? somewhere on IH35 north. ????
What brand and specific tire are these? The inside dual is most prone to heat buildup due to less air flow around the tire. 85 psi is meaningless unless you know the weight on each axle or even better, each corner. If you don't know your weights then the only safe thing to do is to inflate your tires to support your GAWR. That should be on a sticker somewhere around the drivers position.
Don't worry about tire pressure increase with ambient air temp increase. If you inflate to the correct cold temp PSI then you are ok. If you are cold inflated to 100 psi and that is good to carry your weight then your traveling pressure may rise to between 115-125. You might want to invest in a TPMS and then you can monitor the PSI fluxuations.
Good luck. Hopefully this will be your last occurrence.