4amuskie - 5/23/2013 10:12 AM

You best be running Goodyear Marathon at 5 - 10 psi over recommended pressure if your running 65-70mph. That means 55-60psi.

http://www.tirerack.com/images/tires/goodyear/Marathon_Special_Trai...

This over inflating trailer tires by 10 pounds is a real curveball, it's interesting that Goodyear has this bulletin out on line. Who normally researches stuff like this… and how would the general public know about it otherwise? I don't go much above 60 MPH so I'm going to stick to the 50 PSI.

Additionally; it seems like whenever I get new tires installed on about any of my vehicles and subsequently check the tire pressure, they are always underinflated slightly. I just assumed this was for a better ride because I've noticed a difference rolling with like 35 PSI when the max PSI is 50.

But on my trailers I see no benefit to not maintaining the maximum tire pressure, and have had very few issues through the years.