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Old 09-12-2019, 10:24 AM   #1
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Quick TV tire question

I will be using my generation 1 Tundra (4.7 L V8 with 3.91 gears 4WD) as my tow vehicle. I will be towing an Escape 19 or 21 footer. The truck has pretty good capacity (1512 pounds of payload, 7100 pounds towing capacity, 710 pounds tongue weight, 6030 GVWR, 11800 GCWR), but I have a quick question about tires.

From the factory it came with P rated SL tires with a capacity of about 2403 pounds (Load index of 111 @ 26/29 psi) according to the sticker on the door. I put on SL rated tires with about 2469 pounds of capacity (Load index of 112) @44 psi, although I keep them at 36 psi for better wear.

If I use this as my TV, should I consider going to "10 ply" 3415 pound capacity @ 80 psi (Load index of 123). My gut feeling is that that using "10 ply rated" tires would be overkill for what I will be doing + I don't think pressuring them up to 80 psi would be a good idea for ride and tread life.

Thoughts?
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Old 09-12-2019, 10:45 AM   #2
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I do not think you will enjoy towing with 10 ply tires and that high pressure. BTW, do you have a full size spare? I had to purchase on for my Ram.
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Old 09-12-2019, 10:50 AM   #3
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I bought light truck tires for my Ford Explorer ( was part of Firestone recall ). As they aged, the road noise became intolerable. Replaced with passenger tires, as spec'd by Ford, and I could hear again.
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Old 09-12-2019, 10:53 AM   #4
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I was in a similar position. My criteria was to go to an XL rated tire rather than the stock SL rated tire. In my opinion, the 10 ply rated tire is overkill and most likely will result in poorer fuel economy and poorer handling than an XL rated tire. I did have to go up one tire size but that had the positive effect of making my speedometer more accurate. My preferred tire and one that would work well in the Maine climate is a Nokian WR G4 SUV 255 /60 R18 112H XL BSW, up in size up from the stock size of 245/60 R18. This is my third set of Nokian WR SUV with two different vehicles and I will be getting them again when the time comes unless some other tire comes up as superior.

This is a fun site to use when deciding on tire size.
https://www.discounttire.com/learn/tire-size-calculator
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Old 09-12-2019, 11:51 AM   #5
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My F150 came with E's, which are the 10 ply of old, will hold up to 80 psi. The truck placard says to use 55 in the front and 60 in the backs, which I do. They work just fine for me, but I'll change to the highway version of these (Coopers) when I need to change them, the M&S's ride a bit rough. I'd imagine you'll notice a rougher ride too, but they work, and don't need 80 psi. go by what the truck calls for.
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Old 09-12-2019, 11:51 AM   #6
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Quote:
Originally Posted by cpaharley2008 View Post
BTW, do you have a full size spare? I had to purchase on for my Ram.
Yes I have a full sized spare under the bed. I actually pull it out once in a while to make sure I can if I need to.
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Old 09-12-2019, 12:06 PM   #7
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I carry my full size in the bed and the temporary stays up underneath, 2 spares .....
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Old 09-12-2019, 12:29 PM   #8
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If you go to E rated tires you get more load capacity which it appears you do not need. You also get heavier sidewall construction which reduces the chance of sidewall damage. If you are boondocking you might need this advantage.

The downside to using an E rated tire is rougher ride, lower fuel economy anf less tread life. An E rated tire will wear faster because it runs hotter.

When deciding on what pressure to run in any tire you also need to be aware of the maximum pressure capacity of the wheel and valve stem. Wheels and valve stems have maximum pressure capacity that may be lower than the tire.
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Old 09-12-2019, 01:02 PM   #9
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keep on mind that the tire capacity is only one item in determining vehicle load capacity, wheels, axle, and suspension, are all a part of a matched set.
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Old 09-12-2019, 01:11 PM   #10
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My Tacoma came with P series XL tires, I replaced them with LT 'E' rated BF Goodrich All Terrain KO2's, but kept the inflation pressures closer tot eh toyota recommendations, than the load range 'E' tire's max 80 PSI, and they rode great, handled great, and after 20,000 miles still had 65% of their tread wear left. they were also awesome off road, handling most anything short of thick goopy mud with total confidence.

When I got my F250, which calls for load range "E' tires, I got the same thing, and run them at the F250's recommended pressures (70PSI in the back, 55 or something in front)

there's a table for tire sizes, axle weight, and pressure. 80PSI would be required on those size tires if you ran them at their maximum rated weight, which is far higher than my Tacoma or your Tundra would ever do.
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