Want to upgrade tires

2-MTnesters wrote:

Cummins12V98 wrote:


I think you should contact GY Tech Support.

I did when changing from GY E to GY G on our Avion Platinum. There is a weight/inflation chart for each tire.

Per GY they said to weigh the axles to determine tire load then use the chart add 5psi to that number. Tires have a "MAX" load psi that does not mean you have to run them at that psi. Mose RV's come maxed out weight wise based on what the tires can carry that is why the RV mfg says to inflate to XX and that usually happens to be the tires MAX pressure!

GY Tech said not to run 110 when only 80-85 is needed. Max psi 110 will make the RV ride much harder, wear the center of the tire and have less stopping traction then using 80-85 if that is what the chart says.

I ran 85 psi on the G's on the Avion for 5 years with even tread wear and never a problem.

I am doing the same going from GY G to H using the weight/inflation guide.

I was told that with my 7000# axels and GVWR of 5er being close to 16000# to run them at max pressure +- a few lbs. This came from the GY rep. I have always run my RV tires at max pressure at the recommendation of the tire reps and have never had any issues with wear or anything else. Maybe each circumstance is different but I will continue to do what is recommended by my selling dealer for my rig. I will say that IMHO Keystone has inferior tires on their Montana's by having the GY Marabombs installed. Tim

I've NEVER been told or read to add "a few extra lbs. psi" after airing to 110 psi...ONLY thing I've seen is if you are going to let the 5er set for months on end and tires are going to support the 5er, add 5 psi....Nowhere have I seen where it states to check tires, cold air pressure, air to recommended psi....and then, for good measure, add a couple more lbs..doesn't make sense.....If states to air to 80, air to 80, if 110, 110, if 65 then 65....having worked in and around tire manufacturing long enough to learn from the design and manufacturing engineers, that doesn't make sense to add " a few extra lbs" on top of the recommended air pressure for a particular tire.