TT Air pressure
I upgraded my TT tires from some Chinese? brand 205/75/14 LRC to Goodyear Endurance 205/75/R14 LRD. Trailer states 32lbs tire pressure, new tires have cold pressure 65lbs. Di have to stay with what th...
Forum Discussion
allenm wrote:
I also have Goodyear Endurance ST20575R14D tires on my 3,750 GVWR Jayco. I've been thinking about lowering my tire pressure down from 65 psi. My problem is bouncing, especially on concrete interstates.
If I subtract 12% to account for hitch weight, I'm down to 3,300, which would be 1,650 per tire. Goodyear's Load/Inflation table for these tires shows 45 psi will carry 1,640 lbs. I'm thinking of going down to 50 lbs to see if that helps on rough roads.
For what it's worth, my trailer has a Lippert 3,500 lb single axle. I think these lightweight single axle trailers are prone to bouncing on rough roads.
https://www.goodyearrvtires.com/pdfs/rv_inflation.pdf
One factor to keep in mind is that as pressure goes down, tire temp goes up (this from a tire engineer). Take two comparable sized tires, say one D and one E rated. Air the E rated down so it can carry same load as the D rated (using tire tables). The E rated will run hotter than the D Rated. Heat is one of the big enemies of tire life.
You might try dropping perhaps 5psi, but I wouldn't want to drop all the way down to 50. Especially if you haven't actually scaled the TT. I would value tire longevity over trailer ride any day of the week. That's just me, though.
