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Old 07-30-2019, 05:20 PM   #1
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New Tow Vehicle tires

It's becoming time to replace the tires on my 2011 Chevy 1500 4 WD short box regular cab with 30K miles. They are currently P265-70x17 Wrangler AT/S. I have a porpoising problem when trailering that I have been battling on rare road conditions since I purchased this unit. I would like to upgrade to a LT, Load range C, or 115 class tire. Do you experienced folks think this would help? I want stiffer sidewalls that I think might alleviate the problem. I also love the P rated tires for their grip characteristics here in Northern NY during our annual winter trials! Any advice is greatly appreciated.
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Old 07-30-2019, 06:28 PM   #2
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I replaced my P rated tires with LT rated Michelin LTX AT2s. Best thing I did for handling. Load range is E. Ride quality will suffer a bit but Id rather tow with ease than white knuckle it. I have 154k kilometres on those tires. I will replace before winter as tread is around 5mm now.
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Old 07-30-2019, 07:00 PM   #3
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I'd go with the LT's. I would also add on either a Roadmaster active suspension https://activesuspension.com/ or a pair of airbags to help with the load. The Roadmaster will help with front to back and side to side bouncing.
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Old 07-30-2019, 07:44 PM   #4
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Just took my first trip with new LT tires, Cooper. Noticeable improvement.Much more stable, no buffeting from passing 18 wheelers. I previously switched to Goodyear Endurance tires for the RV.
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Old 07-30-2019, 08:13 PM   #5
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You will not be disappointed with the LT tires. P or passenger tires are not rated for heavy towing. As to brand 6 of one and a half dozen of the other. I run Cooper Discoverer AT3 and have had good luck with them.
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Old 07-31-2019, 02:27 PM   #6
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Thanks all.
Mark5w - I added coilovers per a family member suggestion - helped a bit.
Dagst1 - What rating on LT3's? there are at least 2 different load ratings I have found.
RussB - What model Coopers and what load rating?

The weights on my trailer are 4812# dry with a GVW of 7598#. I am at 6200# loaded. Tongue weight is 800# loaded - 13%. Weight distribution is 2 dangling links and right on level.

I am really wanting to avoid 10 ply for the Rochester winters and am hoping there is a 6 ply equivalent in one of your suggestions. Load range C or 115 are kind of where I'm at unless you good folks all agree that E's are the only real good choice.
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Old 07-31-2019, 02:46 PM   #7
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I'm running LT's also. (10 ply)
You don't have to pump them up to 80# when you are not hauling or towing It just isn't necessary. If you drop the pressure down when running empty, it will really help in the winter. Give a better ride also. Granted, it probably won't be like your P rated tires, but it will be a lot better then running around with 80# in them. Is your truck 4 wheel drive? If so, you might have to use it a little more in the winter.
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Old 07-31-2019, 02:59 PM   #8
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My truck came with and calls for load range E tires. As stated you do not have run them at 80 psi. My 2500hd calls for 60 in the front and 72 in the rear. My 5th wheel puts over 2000# in the bed and the Cooper tires ride good when loaded. Empty it rides like a truck. But with the crew cab and a long bed its not too bad.

Just a side note the cooper tires do very good in our Mo. snow.
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Old 07-31-2019, 04:54 PM   #9
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Quote:
Originally Posted by jmnsn57 View Post
Thanks all.
Mark5w - I added coilovers per a family member suggestion - helped a bit.
Dagst1 - What rating on LT3's? there are at least 2 different load ratings I have found.
RussB - What model Coopers and what load rating?

The weights on my trailer are 4812# dry with a GVW of 7598#. I am at 6200# loaded. Tongue weight is 800# loaded - 13%. Weight distribution is 2 dangling links and right on level.

I am really wanting to avoid 10 ply for the Rochester winters and am hoping there is a 6 ply equivalent in one of your suggestions. Load range C or 115 are kind of where I'm at unless you good folks all agree that E's are the only real good choice.
Cooper Discover AT3, 265/60/R18 load E Discount Tire was the best price in my area.
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Old 08-01-2019, 07:31 AM   #10
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Just put new Michelins 265 70/R17s on my 2500 yesterday. I only use my big truck to tow the 5er. The rest of the time it stays in the garage. I have to admit I hadnt kept the tires rotated. So when I had the old ones taken off. We noticed a little wear on the inside of the front tires and the rear tires had been more worn flat. So, front end alignment scheduled for Monday and tires will be rotated like they should be from now on.
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