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Old 02-16-2024, 04:04 PM   #1
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Tire wear in center of TV rear tires

Besides over-inflation, what would cause the rear tires of the TV to wear in the center on both tires? I had no problem with my previous trailer with the same TV and hitch. The only thing different is the trailer. Maximum weight trailer rating for my TV is 10,160 and I am well under that. TIA
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Old 02-16-2024, 04:13 PM   #2
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As you mentioned, over-inflation, especially since it is both tires.
A photo would help.
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Old 02-16-2024, 04:27 PM   #3
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As you mentioned, over-inflation, especially since it is both tires.
A photo would help.
X2!! Bet you ride around 90% time with an empty truck bed like I do. I keep my LT tires on the back no more than 39PSI with an empty truck bed
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Old 02-16-2024, 04:38 PM   #4
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Old 02-16-2024, 04:39 PM   #5
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X2!! Bet you ride around 90% time with an empty truck bed like I do. I keep my LT tires on the back no more than 39PSI with an empty truck bed
Door sticker pressires will carry all the vehicle is rated for as long as spec'd tire size is installed
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Old 02-16-2024, 04:48 PM   #6
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Truck specs say 39psi and that is what I always do. Since I do my own air at home and I have a truck that gives me the air pressure reading on all four tires, I really don't think they were over-inflated. But maybe I inhaled to much exhaust and made a mistake. Maybe Discount Tire did it when the tires were rotated and I didn't notice? I'm just trying to make sure nothing else is going on.
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Old 02-16-2024, 05:20 PM   #7
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Truck tire pressure specs are for a rear axle loaded to full capacity. My bet is your rear axle is running not much more than half of rated capacity. My Ram 2500 rear axle is rated at 6010 lbs, when I am not hooked to a trailer my rear axle weighs 3000 lbs even (checked on a CAT scale). When hooked to my 8,000 lb (or so) camper trailer rear axle weighs 3980 lbs, still significantly lower than the 6010 lb maximum rating of the axle. The wear that you show in your pictures has one cause - overinflation. As a maintenance shop supervisor I was certified in tire failure analysis by Roadway Express in the early 1990s and the causes have not changed since then.
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Old 02-16-2024, 05:55 PM   #8
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Moved thread from the General Tech and Repair section to the Towing and Tow Vehicles sub-forum since the OP's questions are specific to that sub-forum.
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Old 02-16-2024, 07:02 PM   #9
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Truck specs say 39psi and that is what I always do. Since I do my own air at home and I have a truck that gives me the air pressure reading on all four tires, I really don't think they were over-inflated. But maybe I inhaled to much exhaust and made a mistake. Maybe Discount Tire did it when the tires were rotated and I didn't notice? I'm just trying to make sure nothing else is going on.
You say you always do your own air to 39 psi at home. (Accurate gauge?)
You say your truck displays the air pressure. (Matching your gauge?)
Maybe Discount Tire did it and didn’t notice?

Ongoing due diligence says you need to monitor your tires more often, because your tires sure look like they’ve been overinflated. If you’ve got TPMS, push the display more often.
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Old 02-16-2024, 07:37 PM   #10
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Truck tire pressure specs are for a rear axle loaded to full capacity. My bet is your rear axle is running not much more than half of rated capacity. My Ram 2500 rear axle is rated at 6010 lbs, when I am not hooked to a trailer my rear axle weighs 3000 lbs even (checked on a CAT scale). When hooked to my 8,000 lb (or so) camper trailer rear axle weighs 3980 lbs, still significantly lower than the 6010 lb maximum rating of the axle. The wear that you show in your pictures has one cause - overinflation. As a maintenance shop supervisor I was certified in tire failure analysis by Roadway Express in the early 1990s and the causes have not changed since then.
What you describe covers most pickups used primarily to to trailers. One solution to this wear pattern is to rotate tires on a regular schedule. I do mine every time the odometer reaches a multiple of 5,000 miles. Dealer I bought tires from does this for free and also rebalances if necessary N/C.
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Old 02-16-2024, 08:53 PM   #11
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Truck tire pressure specs are for a rear axle loaded to full capacity. My bet is your rear axle is running not much more than half of rated capacity. My Ram 2500 rear axle is rated at 6010 lbs, when I am not hooked to a trailer my rear axle weighs 3000 lbs even (checked on a CAT scale). When hooked to my 8,000 lb (or so) camper trailer rear axle weighs 3980 lbs, still significantly lower than the 6010 lb maximum rating of the axle. The wear that you show in your pictures has one cause - overinflation. As a maintenance shop supervisor I was certified in tire failure analysis by Roadway Express in the early 1990s and the causes have not changed since then.

Thanks for this explanation. My truck is never loaded to full capacity for the rear axle when I am towing. I have not taken the new trailer to the scales yet, but the rear axle on the truck before without trailer was 2420 lbs. and with the old trailer was 3680 lbs.


So what is your suggestion? Lower the air pressure by about four lbs?
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Old 02-16-2024, 09:38 PM   #12
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Thanks for this explanation....


So what is your suggestion? Lower the air pressure by about four lbs?

Online you should be able to find a tire pressure chart for your tire size. I would get the tire pressure chart and follow that for the actual load you have on your tires. It will mean a trip to a truck scale both hooked up to the trailer and not. You pay for the first weight, you get a significant discount on one reweigh. My last scale was $12.50 for the first weigh and $3.00 for the reweigh if I recall correctly.


If you cannot find the chart post the brand, model and size of tires you have and I can try to find it for you.
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Old 02-16-2024, 10:27 PM   #13
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Online you should be able to find a tire pressure chart for your tire size. I would get the tire pressure chart and follow that for the actual load you have on your tires. It will mean a trip to a truck scale both hooked up to the trailer and not. You pay for the first weight, you get a significant discount on one reweigh. My last scale was $12.50 for the first weigh and $3.00 for the reweigh if I recall correctly.


If you cannot find the chart post the brand, model and size of tires you have and I can try to find it for you.

I am running Michelin Defender LTX M/S tires 275/60R20. I found a chart but I can't get to the scales for weighing for a month or so because I had foot surgery and am not able to walk/drive yet. That tire is rated at 2679 lbs. I assume that is per tire. Multiplied by 4 is 10,716 lbs.
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Old 02-16-2024, 11:21 PM   #14
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Thanks for this explanation. My truck is never loaded to full capacity for the rear axle when I am towing. I have not taken the new trailer to the scales yet, but the rear axle on the truck before without trailer was 2420 lbs. and with the old trailer was 3680 lbs.


So what is your suggestion? Lower the air pressure by about four lbs?
Divide by 2 and you have about 1210lbs on each rear tire when empty. That is why your overinflated for the weight the tires are carrying.
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File Type: pdf 2016 Michelin light truck tire inflation chart (3).pdf (51.0 KB, 35 views)
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Old 02-17-2024, 06:08 AM   #15
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Are you starting your drives in a colder environment and driving to a hotter one?

After a couple of blowouts on the highway, I installed a TireMinder so I could monitor pressure going down the road.

I found I had been filling my tires to factory specs, 80 PSI in a colder environment 50F at elevation, and getting on the highway and driving to where the temps were 110 F. I got an overinflation warning and pulled over and let some air out.

I could not find a lot about this and I now fill my tires to 5 PSI lower than specs in a colder environment prior to driving.

Not a lot on what cold tire pressure actually means and what the tire pressure should be adjusted to when going to temp extremes, or even what an acceptable pressure rise for a tire is after it is warmed up, only fill a tire cold.
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Old 02-17-2024, 10:01 AM   #16
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Divide by 2 and you have about 1210lbs on each rear tire when empty. That is why your overinflated for the weight the tires are carrying.

My truck has 20" wheels, which is not listed in the chart you attached. I went to https://tirepressure.com/michelin-de...-tire-pressure to view my exact tire size to get the rating. Max tire pressure is 44 and I run them at 39psi.
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Old 02-17-2024, 10:05 AM   #17
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Summary:

1. The answer was in the first 3 words of the question : "Besides over-inflation..."
Quote:
I really don't think they were over-inflated..
2. Not a matter of belief, they're over inflated. Simple as that.

3. The tongue weight of the trailer being towed -- only part of the time as noted -- is going to be somewhere in the area of 700 to 1,050 pounds (10% to 15%), the cargo capacity of a Ram 1500 is roughly 1,900 pounds, and that's what the tire pressure of 39 psi is designed to carry.

4. The tires are massively over-inflated even when towing.

This rarely occurs in passenger cars as the cargo capacity is tiny and the loads rarely vary. If you want to be hyper OCD get the truck weighed as suggested. There's a reason tires should be routinely rotated.

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Old 02-17-2024, 10:27 AM   #18
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Summary:

1. The answer was in the first 3 words of the question : "Besides over-inflation..."2. Not a matter of belief, they're over inflated. Simple as that.

3. The tongue weight of the trailer being towed -- only part of the time as noted -- is going to be somewhere in the area of 700 to 1,050 pounds (10% to 15%), the cargo capacity of a Ram 1500 is roughly 1,900 pounds, and that's what the tire pressure of 39 psi is designed to carry.

4. The tires are massively over-inflated even when towing.

This rarely occurs in passenger cars as the cargo capacity is tiny and the loads rarely vary. If you want to be hyper OCD get the truck weighed as suggested. There's a reason tires should be routinely rotated.

-- Chuck

Thanks Chuck. I do rotate my tires every 5000 miles. This wear was done in under 5000 miles. The confusing part to me is that I have towed three different trailers, one with the same truck, before this one and have not had this issue. This is my largest and heaviest trailer and it is the one showing over-inflation, immediately, in under 5000 miles. That is why I am baffled. But I now know a lot more about tire pressure when towing and will reduce the air in the tires.
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Old 02-17-2024, 10:58 AM   #19
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Probably suggested previously but look at the tire inflation vs weight data chart for your tires. I know this data is available for trailer tires. A one-time weigh of the truck with and without the trailer will give the required pressures with and without the trailer.

Are these the original tires? OEM tires are often (usually?) optimized by the automobile manufacturer for fuel economy to get the USG off their backs regarding their corporate EPA fuel numbers and in addition old, weathered tires will wear differently from new tires. Seven (7) years is my rule for tires if the vehicle is parked outdoors all the time like my 2017 Expedition which is due for tires this summer (my wife graciously allows my S2000 to use the other space next to her in the garage). Many folks don't drive a car enough years to have the tires age out.

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Old 02-17-2024, 11:55 AM   #20
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Run tires at 5 psi under max cold rating to allow for rolling pressure increase
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