tire pressure

[kejy]

just put new tires on motorhome 285-80-22.5 Michlin xrv set pressure to 105 psi went about 30 miles and tpms went off reading over 120psi am I doing something wrong or is this normal? Any help would be helpful.

[The Brews Cruise]

I'm not sure if it works the same as the TPMS on my wife's Equinox, but I know that with autos with factory TPMS, the TPMS has to be recalibrated when a flat is repaired and repressurized, replaced, or have otherwise had major pressure adjustments. If the pressure is not correct for the weight on the tire, the pressure could change dramatically once the tire heats up. Low tire pressure will cause the tire to rapidly overheat.

[akcretired]

Originally Posted by kejy

just put new tires on motorhome 285-80-22.5 Michlin xrv set pressure to 105 psi went about 30 miles and tpms went off reading over 120psi am I doing something wrong or is this normal? Any help would be helpful.

I am guessing your TMPS is an external system on your RV. You will need to reset your baseline psi and monitor for your new tires. Should work fine then

[Twilightzone]

>"Michlin xrv set pressure to 105 psi went about 30 miles and tpms went off reading over 120psi am I doing something wrong or is this normal? Any help would be helpful."

Very normal for the tires to increase pressure. Mostly due to increased temperature.
Gotta re-set the pressure on the TPS to avoid over-pressure alerts.

[Stever53]

Check your high pressure setting, you might have it set to low.
Safe travels

[Gary RVRoamer]

Yes, a 15 degree rise with the heat of driving on them is quite normal. If this is a change in size from your previous tires, you will want to re-calibrate the TPMS for a new high. In any case, you should change the high temp alarm to something greater than 120.

If not a new tire size, maybe the tire shop increased the psi to a value greater than necessary for your rig? They are prone to do that, either due to ignorance or an excess of legal caution.

[CJ7ole]

Is 105 the correct pressure for your rig? Sounds high, but then I don't have a DP. Don't go by what is stamped on the tire, at least go by the tire placard in the rig. I won't get into the weigh-all-4-corners argument.

[Bob_C]

My tms says to set high limit at 20% higher than tire pressure, and the low limit at 10% lower

[MSHappyCampers]

Yup, it looks like you just need to reset the high pressure alarm point!

[Mr_D]

First find out what pressure you should run, then possibly reset the high alarm psi. Until you know what pressure you should have it's kind of pointless to reset anything.