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Old 12-22-2006, 02:22 PM   #57
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Good info...thanks...if I rotate, it'll be as suggested.

When I place mine in storage, it's inside. I have some "astro turf" type material I place on the floor and roll the trailer up on that.

Due to the temp typically dropping near or at times below zero, I tend to fill the tire PSI when I store it for winter to about 68psi each tire. Before I pull it out for the season, I make sure that cold PSI is back to 65.
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Old 07-10-2007, 10:26 PM   #58
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was planning to post an update on the new tires mounted 11/06 after an uneventful "180,000 miles" on the first 6...

paul prompted me to do it now given his wear/size issue...

http://www.airforums.com/forums/f438...ion-34105.html


good post paul...

so 6 new marathons have been running these last few months....

65psi along with centramatics added at the change over...

so, at 1,000 and 3,000 miles all looked good.

after 3k miles, i started to notice a bit of extra wear on the rear/streetside tire...

this tire can be seen when brand new in post #22.

pressures and temps ok so i continued to just watch it...

at 4-5k this tire was clearly wearing compared to the other 5...

usually i rotate at 9-10k...

at 8,000 miles this tire was at 4/32nds while the others still measured 9+/32nds...

so while having the bearings packed at j/c last month they investigated this issue.

about 9k+ miles and 7 months on all of these tires...

first photo is an 'example' of the 5 normal tires with 9+/32nds...

looks very good for approaching the 10k mark.

second photo is the worn tire along side, on the left.

cheers
2air'

click to greatly enlarge the pix...
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Old 07-10-2007, 10:31 PM   #59
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here are 2 closer views of the worn tire...

wear is very even (a little more near the center)...

and remaining tread measures at 3/32nds!

note the wear bars in the full size photo at midline...

no signs of feathering, cupping, out of round, side bulges or other lumpy changes...

this tire is vanishing, any suggestions?

all 6 are the 'new style marathons' manufacture date spring 2006, china.

cheers
2air'

again clicky for bigger views...
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Old 07-10-2007, 11:06 PM   #60
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Hi, 2air. You have six tires, all the same age, same mileage, same pressure, Etc Etc. One tire is wearing faster than the rest and seems to be even. Normally I would rub my hands on the tire in different directions, but here I will have to go by what was stated and what I can see from the pictures. My first guess is that one disc brake is pulling harder than the rest. There is a tool for measureing the actual pressure the caliper puts on the pads; This tool fits in between the pads and or the pistons in place of the rotor. Test all six. Pressure should be the same on all. Next, the friction quality on the pads could be different on that one wheel. Look to see if the coloring and all markings on the pads match. Try swapping the pads on that wheel with the one exactly opposite side. See if that tire starts to wear faster. And my last thought is that the rubber compound on that one tire is different. Maybe if you know someone in car raceing they can test that for you. I don't think a tire shop can test for the hardness of the tire compound. Finally I rule out alignment issues and these are just my opinions.
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Old 07-11-2007, 12:17 AM   #61
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Too many left turns and scrubbing? Baffling. I say try swapping tires like Robert suggests and see the new tire in the same position does this. If it does, maybe some alignment at just that swingarm is the problem, although it seems to be wearing flat.
Marc
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Old 07-11-2007, 05:45 AM   #62
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Have you checked the diameter of each tire ?
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Old 07-11-2007, 06:32 AM   #63
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It could be that one tire is toed slightly out, but that is difficult to do without changing the camber as well, and you would see feathering on the tread if it was toed in or out. When they take the tire off, maybe you could ask to have somebody look at the inside, see if there are any bumps of bulges that don't belong.
I know tri-axles are kind of hard on tires, but to wear onoly one like that is not good. Do you think you can get Goodyear to warranty it for you? Or not a big enough issue to bother with?
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Old 07-11-2007, 08:20 AM   #64
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Is it possible that tire has more weight on it?
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Old 07-12-2007, 09:33 AM   #65
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Quote:
Originally Posted by LI Pets
Is it possible that tire has more weight on it?
Good question! With our rubber-filled axles I've often wondered what would happen if the rubber in one axle - for whatever reason - was either harder or softer than in the other axles? Say the source for the rubber dowels changed in the middle of the axle manufacturing process to a slightly softer or harder rubber. Just like with tires, quality control issues have a nasty habit of going our of kilter - and oftentimes without being noticed!
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Old 07-12-2007, 09:51 AM   #66
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If on your previous tires there was no unsual wear at that position. I'd look to that particular tire as the problem.
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Old 07-12-2007, 11:21 PM   #67
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Quote:
Originally Posted by Goin camping
If on your previous tires there was no unsual wear at that position. I'd look to that particular tire as the problem.
Hi, if I remember correctly, 2air swapped to disc brakes at or near the same time. That's why I think it could be tire or brake related. If an alignment concern, I would feel side to side feather edgeing on the tire, but I don't have the ability to feel those tires on my computer screen.
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Old 07-23-2007, 09:57 PM   #68
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ok to update those who offered ideas on this issue...

Quote:
Originally Posted by ROBERTSUNRUS
One tire is wearing faster than the rest and seems to be even...
yep that's the gist of it.

Quote:
Originally Posted by ROBERTSUNRUS
...one disc brake is pulling harder than the rest...
hadn't thought of this. the pads were pulled and all were the same thickness.

additionally i've had disc brakes since the trailer was new and with 40k+ miles on the original pads they are wearing nicely. many are in need of new pads at 10-15k miles.

Quote:
Originally Posted by ROBERTSUNRUS
...my last thought is that the rubber compound on that one tire is different...
that was my conclusion also.

Quote:
Originally Posted by 3Ms75Argosy
Too many left turns and scrubbing?...Marc
the rear tires DO get scrubbed more, but my gut is same # of rights and lefts...

Quote:
Originally Posted by ticki2
Have you checked the diameter of each tire ?
i didn't measure the diameters but on inspection the worn tire was clearly smaller...

Quote:
Originally Posted by overlander63
It could be that one tire is toed slightly out...

...Goodyear to warranty it for you? Or not a big enough issue to bother with?
alignment was checked at the factory and reported as normal...

i decided not to bother with the warranty side. too much hassel for 75$...

Quote:
Originally Posted by LI Pets
Is it possible that tire has more weight on it?
this was my initial thought (along with axle issues)

factory guys weighed front/rears individually on each side, and they were within 100lbs all around.

Quote:
Originally Posted by Cracker
if the rubber in one axle - for whatever reason - was either harder or softer than in the other axles?
i asked them about this. the explanation was, "5 of 6" would need to fatigue for this one to show tire wear...

Quote:
Originally Posted by Goin camping
If on your previous tires there was no unsual wear at that position. I'd look to that particular tire as the problem.
as noted back in post #13 and 15, i did have one in the first set show signs of uneven wear at 30k, but it was in another position and on the opposite side...

Quote:
Originally Posted by ROBERTSUNRUS
I would feel side to side feather edgeing on the tire, but I don't have the ability to feel those tires on my computer screen.
yea the wear was pretty even. my thought was perhaps the centramatics could be masking a balance issue.

....

so after all the above gyrations, the conclusion was the rubber compound was perhaps softer in that tire.

a new tire was mounted and balanced, and all the others were rotated...

i'll report back how this new tire wears....

thanks for all the ideas, guys...

cheers
2air'
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Old 02-20-2008, 07:57 PM   #69
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300,000 mile goodyear marathon UPDATE!

greeting vulcanizers and tread watchers...

the 2nd set of marathons passed the 120,000 mile mark several weeks ago....

about 6 months since the last tire update.

i took that opportunity to photo these tires and note the tread depth at 7+/32nds all around...

and here they are...

a couple of shots from the curb side.

very even wear and no signs of foul play.

cheers
2air'

click pic for larger view...
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Old 02-20-2008, 08:01 PM   #70
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now for the street side...

again not bad looking for the mileage...

should be good for another 40-60,000...

pending the unknown events ahead.

cheers
2air'

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