Why trailers almost always have auto inflate on tires, but trucks almost never do?

I was just at a bandag tire shop last week and should have checked my gauge accuracy. Couple years back we changed maintenance vendors at our shop and they took the tester unit.

 

One issue with tire inflation systems, theft and maintenance of the systems. The Union Pacific used to have the systems on rail owned 53' chassis, the problem, when a tire would blow, the vendor would often forget to put the inflator lines back on, or drivers/others were stealing them. The repair facility in Denver used to go through a case a week of inflator hoses, finally the railroad got tired of paying for it ($250/case) and they told the ramps to remove and cap off the systems. Now, they spend tens of thousands a week on tire blowouts and repairs. The one upside to the inflators, the repair guys would inspect them and the tires more closely. Also, you'd get drivers and repair shops with no clue, cranking the inflator vale to max, 140 psi, when it was supposed to be set at 100 psi.

 

It is shameful that folks at the top making good money don't see the value in the system.
They only see up front cost.
But they must be maintained, leaking cap ends and hoses replaced and filter changed regularly and our guys don't do anything to maintain or extend the life of the systems. Hence we have more than half a fleet w/o...lol
I think the newest systems detect overheating wheel bearings too.

 

The real problem with tpms is this fact, the valve stem version of a tpms are not accurate when it comes to temp readings.

You want a system that will warn you about temps and pressure, not just pressure.

so if you are going to get a tpms system, get one with internal sensors, preferably ones that are mounted to the rim.

 

Or everyday you check tires properly when cold and keep a temp gun and shoot hubs every time you stop. Should be doing a walk around every time anyway. I know that is way to much to expect anymore from most drivers.
KISS ( KEEP IT SIMPLE STUPID)
I guess paying for technology is easier than not being a lazy complacent driver.

 

Not gonna help when you pickup a flat whilst rolling and you can then pull off before any further damage..including just a patched or plugged tire. We run singles and when a tire goes it can and will take out a fender,lights and or a bumper. Also most likely you'll damage beyond remount a $400 aluminum wheel.
A system like we use is preset for a warning light and tone at 10 off the normal psi to account for temps,high and low. It takes a strong maintenance program to keep it properly working and we unfortunately let a mechanic go, so only one guy to service trucks that run 24/7/365. So while maintenance is lacking the price for that particular technology more than pays for itself in fuel mileage, extended wear and as an early warning system before catastrophic failure.
This was 2 weeks ago and was able to stop before any collateral damage.

 

I understand for a fleet for sure especially

 

Love's Tire Pass for the win.

 

What if you pull in after driving 400 miles in 110 degree heat? How do they compensate for the increased pressure in all of the tires? Is there a formula? Serious question....I have no idea how they do it. Personally, I use a tire gauge on a regular basis. Steers every morning. I also carry a glad hand inflator hose.