Nope, not at all,
@Mtudb24. I have only stated so far that tire manufacturers say to follow the guidelines of the vehicle makers (and I copied in direct quotes from tire companies, then pointed out that tire changes can be addressed with load tables, with which you disagreed.)
Anyone that thinks that through would realize it applies to the tires the maker stuck on the vehicle, and that things change when you change the tires. So I also added a post about load tables for when you swap out the stock tires with something else. That should help most people determine what tire pressure they need to be running. I used Nitto's load chart for some of their tires as an example.
It's clear that Ram thinks a 2900 lb load rating is about right for off-roading in the Rebel.
Cooper is like BF Goodrich in that they don't provide a load table for recommended tire pressures at load on the web. A good load table will list different loads for the tire, with different air pressures to support those loads properly, according to the tire maker. They may make those load tables available to their dealers. It would be good business sense. Some treat them as a trade secret, which means I won't buy their tires.
As it is, Cooper's recommendations to you are conflicting. This is what they say in plain, clear English, right from Cooper's web site regarding
proper tire inflation. Read it.
The recommended inflation pressures for tires are specified in pounds per square inch (psi) or kilopascals (kPa) as indicated on the vehicle tire placard, certification label or in the owner's manual. Never set tire inflation pressures below the recommended inflation pressure found on the vehicle tire placard, certification label or owner's manual. Under inflation causes excessive heat build-up and internal structural damage that may lead to a tire failure, including tread/belt separation, even at a later date. Do not exceed the maximum inflation pressure shown on the tire sidewall. Over inflated tires (over the maximum molded on the tire sidewall) are more likely to be cut, punctured or damaged by sudden impact from hitting an obstacle, such as a pothole.
Clearly they don't want you to set the pressure above 50psi, or below 55psi.
Of course, Ram is basing their numbers on E-rated tires. Hence the load table really is needed.
When you don't have a load table, you can also use simple calculations,
if they exist.
You can keep disagreeing with me all you want. I'm just trying to help you find what you want. I've pointed out how to use the load tables to your advantage. In the case of Cooper tires, which you hadn't mentioned previously, you're probably going to have to contact them directly, or your local dealer, to get an accurate load (inflation) table.
Otherwise, it's a swag. If it were me, I'd be running those at 45+psi minimum, because their max load is close to Ram's load calculation already. Plus that might keep the TPMS from bitchin'.
Or you can now buy the $600
Trinity tuner which DiabloSport claims can adjust the TPMS threshold. But since you have a 2015/16 Ram, you also have to buy their PCM as well, for another $600 (or $1000 total if you buy both at once).
No matter what you do, you've disagreed with tire maker guidelines, including Cooper's, and with my suggestions and examples on using load tables to reverse-engineer the pressure you want. And each time you mention tires you switched tire brands and models. I give up trying to keep up. You're on your own.
#17 johnj,
Sunday at 11:44 AM
JohnJ
I'm not going to argue with you. It's a waste of time. If you go back in the threads, it was a simple question.. Does anybody who runs something in a size of other then stock size that isn't a load range E and have a max pressure on the sidewall of 50psi what did you do to fool the TPMS? And if you like to go back and re-read my post, I never said I was running anything on my Rebel then Cooper MTP's. I said I have run other tires from Super Swamper, Ground Hawgs, and other brands on my other trucks that never asked for 55psi. Its because all my other trucks were never load range E and asking tor that high of a pressure. My k5 blazer had Super Swampers and Ground Hawgs (no TPMS). My 2003 Tahoe had Super Swampers. My 1996 Chevy ZR2 had Swamper Thornbirds . My 2007 Chevy Silverado had Buckshot Mudders. All those tires asked for 35 or so PSI.
Be done with trying to help me. I don't really care as your tire pressure calculations aren't helping me. Even at 50PSI in the Cooper MTP's, the light is still on asking me to inflate my front tires to 55PSI. I will not inflate those tires past the max tire inflation noted on the sidewall.
I fall back to my original question to the forum. Those that are running a aftermarket tire that are not load range E and don't have a 55PSI tire rating, what are people doing to fool the TPMS. You don't have any real world experience on your Rebel of this condition and anything you have told me is not turning my light off. I will deal with the light or will get a programmer to fix the situation.
Thanks for your time.
