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Old 08-04-2008, 02:40 PM   #435
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The XPS Rib and the XPS Rib Traction tires are only in 16". I looked up my truck and the LTX A/T2 275/65/18 does come in load range E, so when my Goodrich OEM's wear out, maybe I'll get the Michelin LTX. They ought to outlast the truck, at least for how long I own it. Tire sizes have changed so fast in the last few years, though I think it's mostly for style (my tires are bigger than yours) and that seems to be limiting the different styles of 15" tires available.

I probably should forget about this until next winter.

Gene
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Old 08-04-2008, 11:29 PM   #436
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Originally Posted by CrawfordGene View Post
Tire sizes have changed so fast in the last few years, though I think it's mostly for style (my tires are bigger than yours) and that seems to be limiting the different styles of 15" tires available.
It's not just style. The "cool" thing for sure is super low profile tires on giant rims. This has it's roots though in real performance issues. Radial tires perform better with a low aspect ratio. Of course the "posers" take this to ridicules proportions. Race cars are the impetuous for this but life on a controlled road circuit is different than life on the road. Still, the fact is changes in technology have driven the move to larger rims and lower aspect ratio tires.

For trailer applications the lower aspect ratio likely doesn't provide much of an advantage but to avail yourself to the widest range of tire choices you have to keep up with the times. There are still better quality tires than the ST fare available to match the old 7.00x15 size (Yokohama for one) but they are getting harder to find. That is in the US anyway; in Asia they are still common and if import trends continue they may make a comeback.
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Old 08-06-2008, 07:19 AM   #437
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Here are a couple photos of the tire I mentioned earlier in this giant thread. Single strands of the steel cord are poking through the tire here and there all over
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Old 08-06-2008, 08:50 AM   #438
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So let's here it from all the GYM fans about how this wouldn't have happened if he'd checked his tire pressure regularly like his is required to do!
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Old 08-06-2008, 10:57 AM   #439
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Here are a couple photos...
hey thanks for taking the time and effort to post these pix larry...

naturally i'd be tempted to PULL on the threads...

is that really steel cords or nylon threads or some other material?

before returning the tire (have U tried returning it?) i'd snip a piece find out what it really is!

this tire would be 1 that should get the attention and response from a gy company spokesperson...

keep us posted!

cheers
2air'
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Old 08-06-2008, 12:02 PM   #440
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i wouldn't give that tire to anyone. conspiracy theorist that i am, i don't think that tire would ever be seen again. "the truth is out there"
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Old 08-06-2008, 03:31 PM   #441
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This thread has my head spinning! And for someone who suffers migraines that's not good!!! Maxxus or is it Maxxis or what is it? Goodyear vs. Goodrich. Lt, I thought that meant Light Truck and someone's talking about putting them on an F-350 and loading it up and and taking curves at 60 MPH! And now we're getting into Martian landings and who shot JFK!

I lost my trailer's brochure so I don't remember what size rims I have...I just know they're aluminum. I don't remember the tire size either, but I now know how to check the made date thanks to the ABC video. And yes, I will be checking that out.

I had planned on replacing my trailer's tires at the end of the next camping season but maybe I shouldn't wait.

I keep 65 PSI in them, but maybe that's too much. I haven't weighed the trailer, but maybe I should and air up the tires based on the weight per tire and not the fact that I routinely travel on interstates at interstate speeds.

I use an infrared thermometer to check the sidewall temperature every two-three hours while towing, but admit I don't know what temperature I should be looking for. I just compare it to the tow vehicle's tire temp (it's always about 20 degrees less than the TV's).

As Scarlet would say, all this is making my head hurt. I'll think about this tomorrow.
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Old 08-06-2008, 03:48 PM   #442
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I keep 65 PSI in them, but maybe that's too much. I haven't weighed the trailer, but maybe I should and air up the tires based on the weight per tire and not the fact that I routinely travel on interstates at interstate speeds.

I use an infrared thermometer to check the sidewall temperature every two-three hours while towing, but admit I don't know what temperature I should be looking for. I just compare it to the tow vehicle's tire temp (it's always about 20 degrees less than the TV's).

.
Looks like you have too much air in the trailer and or not enough in the truck tires. Get your trailer and truck weighted while hitched. If you go to a truck scale you should be able to get the truck axles weighed individually while the trailer axles are on the third pad. Once you know the weights refer to a manufactures inflation chart for the correct pressure per axle.

As far as the infer red thermometer. 20 degrees difference between the truck and trailer is what causes me to question the tire pressures. My tires run about 105 on the cool side and 110 on the sunny side. Yes black makes a difference in the sun.
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Old 08-06-2008, 03:57 PM   #443
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Well there is a lot to contend with and with the size of this forum, you are going to get a lot of opinions and options. I've been towing for many many years and up until last fall, never lost a tire. Personally I'm not a knee jerk person but I have attended tire safety training sessions and feel that I'm up on it a little more than the average person.

Do I have the answer regarding the perfect solution. No. There are factors at work that cause tires to fail that we don't know about. I cared for my tires and did everything possible to insure they would roll until I made the choice to change them out. Yet with all my carefulness, I still had a Marathon throw tread on me. Bad tire, bad luck, previous damage? I'll really never know. So I did what I considered reasonable and tried to minimize my risk factor.

Personally I'm not ready to jump the wheel size or go to LT tires, but I did move forward with going to a different tire manufacturer who builds their ST tires differently (at the time) from Goodyear. I also moved up to an E rated tire which I feel is completely justified by my heavy 31' slide out unit.

Was it the right move? Time will only tell me that. So there is no answer. You need to review the data, consider the risks and make your choice. Will it be a better choice than someone else? Maybe. All we can do is report our findings and maybe in two years or so, we will sit down and see if the move from Marathon's was truly wise.

Good Luck.

Jack
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Old 08-06-2008, 04:28 PM   #444
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Thanks for the responses guys. I usually run 80 psi in the front tires and 75 psi in the rear tires of my F-250 and 65 psi in the trailer tires. I do often carry a 1,000 # golf cart in the bed while towing.

I, too, experience cooler tires on the shaded side of the rig. My temp reading is usually about 115 in the shade and 120-125 on the sunny side of the trailer and 130-135 and 140-145 respectively on the truck. This is interstate speeds on the interstate. Non-interstate I stick with the posted speed limit there, too. I usually only check the tire temps at rest stops on the interstates.

I'll have the tires inspected closely in the spring while they're off when I have the bearings packed and the brakes adjusted. If there is any doubt, I'll have them replaced because I'm seriously planning a trip up the east coast depending on work schedule, fuel prices, and whether we more or not.
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Old 08-06-2008, 05:30 PM   #445
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I just got an infrared thermometer recently. I did check all the tires before I left for a 100 mile tow. The truck tires were about 20˚ more than the trailer tires and that's with not going anywhere. In fact, 2 of the truck tires hadn't been on the sunny side at all, but maybe they picked up some radiant energy anyway. It is because they are bigger (18" vs. 15" wheels) and have more surface area? The sunny side of all tires was hotter, but I can't remember what the difference was. It may have been around 5˚. I noticed the sidewalls were hotter than the tread, but I figured the tread is pretty much in the shade.

Of course, when we got to the campground, I forgot to check the temps and kept forgetting when we left.

I do remember last week I noticed my laptop was feeling pretty hot. I discovered the F7 and F8 keys were 108˚ although when I stopped using the keyboard, the temp went down in the 90's. Now I know the CPU is under those keys. I never noticed this thing could get that hot and I wasn't even looking at porn. The tech guy I know told me not to worry about it and turn the laptop off when the room got over 75˚. He didn't explain how to use it when it's off.

Whoops, I highjacked myself.

But Tom, you seem to have a lot of air in the TV tires. Here's what Lew wrote when I asked about tire pressure: "The PSI should be matched to your tire load, not the max inflation pressure of the tire." I inflated my truck tires to the max and the center of the tread started wearing much faster, so I've been reducing the pressure in the TV tires looking for the sweet spot. Get a tread depth gauge and keep records of the tread across the tire. I measure it one two different places on the tires and on the inside, center and outside treads. Then keep records of that. You'll find out if you have too much (or too little) air from tire wear and it'll also tell you when you need to rotate the tires.

My A/S tire pressure starts out around 64-67 lbs. depending on time of day, sun, temp, and go into the low to mid-70's when towing. I don't think I've been in temps higher than the mid 90's since I got the TPMS last Spring.

Gene
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Old 08-06-2008, 07:24 PM   #446
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A Very Sad Video

The disastrous consequence of selling out of date tires is scary and holding the executives of the companies that do so directly responsible IMO is more then appropriate.

Oh, wait we don't have a law that defines an "out of date" tire.

This is one scary video:

ABC News

I feel very fortunate that I read this forum.

Thanks guys,

SRW

PS. You may have to watch an advertisement, but hang in there, its worth it.
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Old 08-06-2008, 07:34 PM   #447
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These tv air pressures were actually in my '05 F-250 that I had up until December. I put the max PSI in the tv's tires because I often carry the golf cart when I tow the Airstream and I was also initially getting some sway when passed by semi's. When I increased the air in the tires I eliminated all of the sway without any adjustments to the hitch system. I had noticed that all of the sway was occurring when the semi was adjacent to the truck and already passed the Airstream. I am running, 50 and 45 I believe, in the '08 and haven't noticed the same sway problems.

BTW, I checked the Airstream tires when I got home this evening and the date code on two was 4605 and two was 4705. If I understand correctly, that means the tires on my trailer that was manufactured in January of '06 were made in the 46th and 47th week of 05. That is comforting.
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Old 08-06-2008, 08:18 PM   #448
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Originally Posted by 2airishuman View Post
hey thanks for taking the time and effort to post these pix larry...

naturally i'd be tempted to PULL on the threads...

is that really steel cords or nylon threads or some other material?

before returning the tire (have U tried returning it?) i'd snip a piece find out what it really is!

this tire would be 1 that should get the attention and response from a gy company spokesperson...

keep us posted!

cheers
2air'
My finger said it is steel...Ouch!! I actually had this tire mounted while on the road as a spare, so I never really had to look at it when purchased. I was shifting things around when I realized the situation. I never had a chance to not have the right pressure in the tire on the road being a spare. I called the local Goodyear dealer today and he said it should be no problem getting it exchanged (I will look at the new tire before I leave!) said I should call Goodyear first, then come see them for a new one. We'll see if it goes that smoothly.
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