tire pressure
just had new G rated Sailun tires put on rig. These tires are rated at 110 psi Our rig weights around 19,000 lbs Am I okay to keep the psi at 90lbs or should I always keep them at 110 psi?
Forum Discussion
Cummins12V98 wrote:Goodyear Marathons are highly touted on this forum by many. The one that separated was less than 2 years old and had less than 4000 miles on it. I have weighed the truck and the trailer on the CAT scales and NO I was not overloaded. I have used manual and TPMS since new to check PSI. I drive at 64-68 mph. The advice I was given was based on the experience of one with 50+ years driving a commercial truck and was no "story" Sorry if my 2 cents bothered you.EgorKC wrote:Cummins12V98 wrote:
" He and his tire guy both suggested 95 max as tires gain PSI once they have been up to highway speed for a few miles."
Tires are designed to allow for increased heat and pressures no matter the inflation as long as the weight and inflation are applied properly. Poor reason to run 95. If there are other reasons as that is the proper pressure for the load that's fine.
True points. However, I ran 3 brands of tire on the recommended 80psi on factory supplied aluminum rims. 1st set from OEM I changed after 1 year as they were showing excessive wear. 2nd set were Continental the dealer recommended. Tire tread separation after 2nd year. 3rd set were Goodyear Marathons and a tire tread separation blowout did severe damage. Ran all 3 sets on TPSM at factory recommended 80 PSI. All 3 registered over 96 psi and 112-115 F on the highway. The factory aluminum rims were rated at 2900lb. Max for trailer when loaded. Switched to steel rims rated at 3500 lb and Sailun's. Tires run at an average of 105-109 PSI and temps in the same range.
Your story proves pizz poor tires are pizz poor tires and the factory uses the ratings of the tires to rate their RV's, many times and possibly you were overloaded like many and did not even know it.
