Tire Pressure-Truck and TT

Did you perhaps install new Endurance tires on the TT? If you previously had LRD 15" tires in 225 width, the same size in Endurance becomes LRE. It's always recommended to run ST trailer tires at max. sidewall psi in order to get the highest possible reserve load capacity to get longer service life and minimize risk of a blowout. But you need to know that the rims can handle 80 psi and if you are way above the load capacity you need, you can reduce the pressure (per load table) or just go down to 65 psi.

A GVWR on a TT of 6800 lbs or so it pretty common and means the axles are normally going to be rated 3500 lbs. The new RVIA policy is that tires should have a reserve load capacity of min. 10% of the axle ratings. It's commonly stated that there should be a min. 15% reserve load capacity based on the actual wt. of a TT. Our GY Marathons have given us around 30% reserve capacity and we're just upgrading to Endurance tires which will be LRE and I'm going to run them at 80 psi because our rims are rated for it. Our TT would have had LRC from the factory.

BarneyS wrote:
I always ran my truck fronts at 75 and rears at 80 whether towing or not. Never had a problem with wear or rough ride.

Same here. Been doing it for 6+ years and no issue. Reason I run higher pressure like that is the truck handles better that way. Sticker on the 2012 GMC Sierra 2500 we just got says to run the rears at 80 psi and 65 front, so higher pressure can't be bad for the tires. I have no problem with the ride being harsher. Just got new tires with a kevlar side belt and I can sure sense and feel the road surface more.
Along with new Bilsteins, handles like a sports car!