Goodyear G614 air pressure

Hamnet wrote:
Not sure if this has been asked.
Original set of tires had 80 pounds max pressure. The Good years has 110 max cold pressure. The tire shop put 90 pounds in them. My rims are rated for 110#.
Since I ran original tires at 80, should I continue with 80 or put max cold air pressure in the goodyear. Our 5th wheel max weight is 14995. When I am loaded we usually weigh around 14500 pounds.
Thanks

Tire industry standards are very specific about inflation pressures for “plus sized” replacement tires. This is what is required. Replacement tires must provide a load capacity equal to the load capacity the Original Equipment tires provided. That load capacity is determined by the vehicle manufacturer’s recommended inflation pressures for the OE tires. That information is found on the trailer’s certification label, tire placard or in the trailer’s owner’s manual.

So, if your OE tires provided 3520# of load capacity inflated to 80 PSI, your target is 3520# for the GY G614s. That’s going to be right at 100 PSI.

The USTMA says to NEVER use less tire inflation pressure than what has been recommended by the VEHICLE manufacturer. In this situation the new inflation pressure would be 100 PSI which equals the vehicle manufacturer’s recommendations. A well trained installer would have told you that.

Chapter #4 of the reference in the “click here” below supports that statement.

Click Here!

I did the same and ran 85psi. GY Tech says use inflation chart and add 5psi when up sizing load range. I NEEDED 80 with the "E"s and used 85 on the "G"'s for several thousand miles with perfect tread wear.

I have the G-rated Sailun which are rated for 110 psi max, just like your Goodyears. Our toyhauler weighs 15,000 lbs., with 12,000 lbs. on the axles. I run our Sailuns at 90-95 psi.

Full pressure could give you a pretty rough ride. I would experiment to find the best ride, but I would start around 95 psi., and go up or down 5 psi at a time to find the best ride.