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?

Possible alignment or bent axleUse a straight edge against front/rear tires and measure gap at front edge VS gap at rear edgeCheck out this info on axles/alignment etc

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.

Tight turning plays heck with tires.

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?

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.

Tire Wear Question | Good Sam Community

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
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?
azdryheat
Explorer
Oct 18, 2017
Tight turning plays heck with tires.
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.
Old-Biscuit
Explorer III
Oct 18, 2017
Possible alignment or bent axle

Use a straight edge against front/rear tires and measure gap at front edge VS gap at rear edge

Check out this info on axles/alignment etc

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