Forum Discussion

babar445's avatar
babar445
Explorer
Jun 21, 2017

Tire upgrade air preasure?

I recently replaced the d rated Goodyear marathons with the new e rated Goodyear e rated endurance tires. The tire pressure on the the original d rated marathons were 65 lbs as listed on the factory sticker but the newer e rated tires max preasure is now 80 lbs. I'm courius what others have done when upgrading to a larger capacity tire. Right now I just met in the middle with about 72-73 lbs (the wheels are rated for 80 lbs) but not sure what would be best.

16 Replies

Show More
  • rbpru's avatar
    rbpru
    Explorer II
    Jun 22, 2017
    My tires are rated "C" at 50 psi and rated D at 65 psi. I run them at 65 psi.

    If your rims and valves will handle the pressure I would run the max.

    You may notice more vibrations transferred to the TT.
  • babar445's avatar
    babar445
    Explorer
    Jun 22, 2017
    Ron3rd wrote:
    With all trailer tires you run the maximum printed on the sidewall, so in this case it would be 80 psi

    This was the awnser I was looking for, whether it was the recommendation on the travel trailer or the recommendation of the sidewall of the tire.
  • Huntindog's avatar
    Huntindog
    Explorer
    Jun 21, 2017
    babar445 wrote:
    I recently replaced the d rated Goodyear marathons with the new e rated Goodyear e rated endurance tires. The tire pressure on the the original d rated marathons were 65 lbs as listed on the factory sticker but the newer e rated tires max preasure is now 80 lbs. I'm courius what others have done when upgrading to a larger capacity tire. Right now I just met in the middle with about 72-73 lbs (the wheels are rated for 80 lbs) but not sure what would be best.
    There are basically two advantages to moving from a D to an E tire/

    1. Heavier duty construction.
    2. More capacity.

    The caveat is that you only get the increased capacity if you air the Es to 80.

    Increased capacity IS generally desireable.
    In the case of a road hazard with tires just barely enough for the load, the remaining tire will be overloaded and should be replaced as well. With more capacity, this becomes less of an issue.

    So run them at 80.
  • Lwiddis's avatar
    Lwiddis
    Explorer II
    Jun 21, 2017
    "I'm courius what others have done when upgrading to a larger capacity tire"

    What others have done is follow the manufacturer's recommendations...unless you know more than the....manufacturer. Multiple posts will get the same responses.
  • Ron3rd's avatar
    Ron3rd
    Explorer III
    Jun 21, 2017
    With all trailer tires you run the maximum printed on the sidewall, so in this case it would be 80 psi

About Travel Trailer Group

44,043 PostsLatest Activity: Jul 20, 2025