Forum Discussion

jwadd's avatar
jwadd
Explorer
Apr 14, 2017

New Maxxis yesterday- not so sure

I need some advice. I bought brand new Maxxis 8008 yesterday at a shop I have never used before. I had to travel 160km as they were the closest shop that has Maxxis brand tires. They are 225/75/15 load range D. They did the install and and balance. All went well and I made it home.

I don't know the exact weight of my trailer. I am guessing around 8000lbs as sticker says unloaded weight before options is 6560lbs. 2008 Keystone Hornet 27BHS.

They inflated these new tires to 45psi with nitrogen. I questioned the young installer about pressure and nitrogen. Said the lower pressure would provide a way smoother ride and they use nitrogen in all their tires as standard practice at that shop. I left assuming this young man had been trained and knew what he was talking about.

Based on reading other posts I am now questioning the tire pressure. Should I add air to cold max of 65psi. We regularly load up for longer 2-3 week trips. 45psi seems low to me and defeats the purpose of load range D tires. It did tow just fine and all tires remained cool coming home. We were loaded for two days and no water.

Advice please.

FYI - our local shop only had Carlisles and another brand I had not heard of.
  • Lwiddis's avatar
    Lwiddis
    Explorer II
    Apr 14, 2017
    "They inflated these new tires to 45psi with nitrogen. I questioned the young installer about pressure and nitrogen"

    Young installer knows little...get them up to 65 psi.
  • Huntindog's avatar
    Huntindog
    Explorer
    Apr 14, 2017
    bobndot wrote:
    Most of the time max PSI is used on trailer tires because most trailers are towed near gross weight.
    Sometimes trailers do not weigh close to the gross weight and your tires may wear out in the middle at max PSI. So, over time, check the wear of your tires and its ok to reduce the PSI by 5 lbs or so in order to have your tires wear correctly.
    But... Treadwear isn't usually important to most people as the tires will age out loooong before the tread. Using max pressure will reduce any sway, and more importantly give a reserve capacity... This can be important. If on tire blows on a tandem axle for some reason, the remaining tire takes it's load. If running reduced pressure, or tires that are right to the limit, it means that the remaining tire should be replaced as well as the blown tire, as it was likely damaged due to being overloaded.
  • bobndot's avatar
    bobndot
    Explorer II
    Apr 14, 2017
    Most of the time max PSI is used on trailer tires because most trailers are towed near gross weight.
    Sometimes trailers do not weigh close to the gross weight and your tires may wear out in the middle at max PSI. So, over time, check the wear of your tires and its ok to reduce the PSI by 5 lbs or so in order to have your tires wear correctly.
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Apr 14, 2017
    65 PSI COLD

    Fortunately.......only ran them 100 miles underinflated.
    Hopefully no cord/belt damage to NEW tires??


    As for the N2----great marketing ploy
    YES N2 has larger molecules then air therefore doesn't 'seep' out thru tire compounds as easy.
    YES N2 is drier then air so no moisture collection inside tires

    BUT unless you get it for FREE, have regular/easy access to that FREE N2 and plan on towing trailer at NASCAR speeds (which means you should be using it in tow vehicle tires also)---forget about it.

    Air is 78% N2 (21% O2 and 1% water vapor/other gases)

    Next time you check/adjust those trailer tires where do you plan on getting the gas....N2 shop or O2 compressor---bet it is O2 compressor :B
  • Rainier's avatar
    Rainier
    Explorer
    Apr 14, 2017
    donn0128 wrote:
    All trailers tires should be inflated and kept at the max pressure as listed on the tire sidewall. Anything
    less reduces the tires load carrying capacity.


    X2
  • donn0128's avatar
    donn0128
    Explorer II
    Apr 14, 2017
    All trailers tires should be inflated and kept at the max pressure as listed on the tire sidewall. Anything
    less reduces the tires load carrying capacity.
  • Boon_Docker's avatar
    Boon_Docker
    Explorer III
    Apr 14, 2017
    Inflate them to the pressure stated on the sidewall which should be 65 psi.

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