Originally Posted by mainec
I really appreciate everyone's feedback. So if I understand right I am going to go forward with the Goodyears. When they pull the Westlake tires off I will check the wheels and see if they are 110 psi. If so then we are good. If not then I am going to run the Goodyears at 85 psi.
Not the best idea for several reasons. IMO the biggest issue is internal ply shear issues with derating (low pressures) a heavy tire on a close spaced axle vehicle such as a RV trailer.
Read this from our resident tire engineer... Tireman9. Check out the rest of his tire safety blog on tires for trailers.
RV Tire Safety: "Interply Shear" and other Techno Babble
And if you decide to go ahead and derate the G614 to those low pressures read this from ;
Tire Load and Inflation Ratings
Note: Towable – Travel Trailer/ 5th Wheel owners Due to the severe use conditions experienced by tires when axles are very close together – tire industry experts recommend maximum (sidewall) inflation pressure for towable tires unless this causes a sever over-inflation situation (20psi+), often referred to as the ‘basketball effect’. If this is your situation allow a 10 – 15psi safety margin above the minimum required inflation pressure.
And finally this from Goodyear RV website on pressure for tires on a trailer;Weighing your RV - Goodyear RV
Goodyear Tire and Rubber .... weighing RVs
Unless trying to resolve poor ride quality problems with an RV trailer, it is recommended that trailer tires be inflated to the pressure indicated on the sidewall of the tire. Trailer tires experience significant lateral (side-to-side) loads due to vehicle sway from uneven roads or passing vehicles. Using the inflation pressure engraved on the sidewall will provide optimum load carrying capacity and minimize heat build-up