View Full Version : Wheel Ratings

09-10-2019, 11:33 AM
We just returned from a wonderful trip to Alaska. Now it's time to replace the factory tires. I have read the posts regarding Sailuns and Goodyears and am trying to decide which one to go with. That's not the question. The wheels that came on the trailer are marked for 110 psi maximum. Is that the cold tire pressure or the operating tire pressure? I have a TST TPMS and saw an 8 - 12 psi increase depending on the ambient temperature and which side was facing the sun, so I would be over the limit if that is operating psi. Also, I can't find any markings on the generic spare tire rim. Can we expect that Keystone would use the same rated spare? LOL

2019 MHC 321MK
2018 F-350 6.7 PSD, DRW

AZ Traveler
09-10-2019, 12:26 PM
Pressure ratings for tires and wheels are cold pressures. A 110 PSI tire or wheel will handle the 130+ PSI once it gets hot.

09-10-2019, 02:31 PM
Zack is correct on that. I have seen our as high 128 with no problems on a very hot day of travel.

Carl n Susan
09-10-2019, 04:03 PM
Also, the generic steel spare wheel is fully capable of 110 PSI.

09-10-2019, 06:20 PM
I third that, our sailuns will get to 128-129 on a hot day when started out at 110 psi

09-10-2019, 07:28 PM
I'm running 17.5" 125 PSI tires and they will get up to 150 on a hot day, 145 even on a cooler day.