Forum Discussion

thd's avatar
thd
Explorer
Oct 18, 2017

Tire Wear Question

I have a Seismic 355W and I picked it up from storage today. I was underneath just checking stuff and notice cupping on the edge of my tires. Both sides. Left front is the worst, with significant cupping inside and out. Tires are G rated and inflated to 110psi, always run max pressure.

What causes cupping on both inside and outside edges of the tire? Alignment issue?

I also started using a TPMS and was wondering what the max pressure alarm should be?
I set the alarm for 130 psi, and when the outside temp was above 90 degrees, the tires would exceed 130 psi. Is this normal?
Toy Haulers
  • thd's avatar
    thd
    Explorer
    Oct 18, 2017
    Thanks for the link. Good info.
    I was able to check it fairly easily. I have about 1/16th of an inch gap on the front edge of the front tire on both sides. Looks like a very slight tow in and even on both sides. The link said less than 1/8th of an inch is ok.
    Also, with the tpms, I am not seeing excessive heat in any one tire. The only difference in temperature I see is when the sun is shining on one side. The side facing the sun always runs a few degrees warmer.
  • thd's avatar
    thd
    Explorer
    Oct 18, 2017
    azdryheat wrote:
    Tight turning plays heck with tires.


    Now that may be a possibility. I live on a cul-de-sac and its a tight turn around to leave. Usually the tightest turn I do on pavement. Just didn't think a quick turn around like that would wear that much?
  • CapriRacer's avatar
    CapriRacer
    Explorer II
    Oct 18, 2017
    thd wrote:
    ..... I have about 1/16th of an inch gap on the front edge of the front tire on both sides. Looks like a very slight toe in and even on both sides. The link said less than 1/8th of an inch is ok.
    .......


    My experience with cars is that 1/32nd each side (1/16 total) is where this has to be to avoid tire wear problems. I don't know if that applies to trailers, but I would think it would.
  • thd's avatar
    thd
    Explorer
    Oct 18, 2017
    How about how much increase in pressure one can expect that is considered normal? Is 130+ for a 110psi g rated tire normal in warmer conditions?
    Be nice to know where to set the high pressure alarm on the TPMS.
  • time2roll's avatar
    time2roll
    Nomad
    Oct 19, 2017
    Cupping is usually out of balance, bad shocks, worn components. Created by the tire oscillating up and down as you travel at speed.
  • thd's avatar
    thd
    Explorer
    Oct 19, 2017
    time2roll wrote:
    Cupping is usually out of balance, bad shocks, worn components. Created by the tire oscillating up and down as you travel at speed.


    No shocks, and I fairly recently upgraded the suspension parts with a wet bolt kit and heavy shackles.
    The wheel that has the tire that is wearing the most was recently replaced under warranty. I had the new one balanced when I had it mounted. Maybe I should have them recheck it.
  • time2roll's avatar
    time2roll
    Nomad
    Oct 19, 2017
    Check for out of round also.

    Steel wheel? Have it balanced with a lug centric adapter on the machine. Hole in a steel wheel is just stamped and not always centered perfect. The standard cone adapter will have the wheel off center. Some worse than others.

    Also you could have someone follow you to observe the tire if it is really bouncing badly.

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