1-ton trucks, what tires do you have?

[Luckychase5]

I’m curious. I’m trying to buy new wheels and tires. I’ve been told by two shops Toyo AT3 in 35x12.5R17 load rating E ten ply tires would do the trick. Then one shop told me they aren’t rated for my truck, a 2015 Ram 3500.

Sticker in the door says front 65psi, rear 80 psi. Current tires are 65psi cold max, no low pressure warnings. Any ideas? I’m getting confused. I’ve never had this much of a problem buying tires before.




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[andy_b]

If you look at Toyo's specs, they'll let you know what the weight rating is for a given size tires. In conjunction with the GVWR on the VIN tag of your truck, you should be able to figure out what size would be appropriate.

The tire pressures on the door tag are only for the stock tires.

The third shop might have been confused by which specific 35" AT3 you were looking at. Based on Toyo's spec sheet, the 35x11.5 only has a weight rating of 2900lbs; maybe they were looking at that one instead of the 35x12.5-17

 

[Luckychase5]

If you look at Toyo's specs, they'll let you know what the weight rating is for a given size tires. In conjunction with the GVWR on the VIN tag of your truck, you should be able to figure out what size would be appropriate.

The tire pressures on the door tag are only for the stock tires.

The third shop might have been confused by which specific 35" AT3 you were looking at. Based on Toyo's spec sheet, the 35x11.5 only has a weight rating of 2900lbs; maybe they were looking at that one instead of the 35x12.5-17

They said something about the load index, 121, being low. I’ve never used that before, just Load Rating, which is E.
The tires are rated over 3100lbs


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[Ranger Bob]

It's not easy to find proper load range off road tires for HD trucks. My 2016 Ram 2500 came with 20" wheels and I leveled it and jumped up to 35" tires immediately. I was pulling a gooseneck horse trailer three days a week at the time and I didn't want to give up anything in capability. I ended up going with Cooper Discoverer STT-Pro in 295/65-20. These tires are rated for 4080lbs, Range E and 80psi. I think you will struggle to find a proper load range tire for your truck in a 17" wheel. If you are not planning to tow/haul at max capability, you may be able to go down in load range and reflash your TPMS. A big name tire store will probably never recommend putting a lower load range tire on your vehicle for liability reasons.

Bob

 

[andy_b]

They said something about the load index, 121, being low. I’ve never used that before, just Load Rating, which is E.
The tires are rated over 3100lbs


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The load index is technically the weight rating.

What is the load index on your original tires? Use that as the minimum when you're comparing to other tires. As Ranger Bob mentioned, finding appropriately rated tires can be tough.

 

[Luckychase5]

The load index is technically the weight rating.

What is the load index on your original tires? Use that as the minimum when you're comparing to other tires. As Ranger Bob mentioned, finding appropriately rated tires can be tough.

I didn’t see a load index rating, just E rated
And no additional info in the manual




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[Luckychase5]

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[andy_b]

Sorry, on the sidewall of your OE tires.

 

[Luckychase5]

Sorry, on the sidewall of your OE tires.

Aftermarket tires were on the truck when I bought ut


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[andy_b]

Well, you can ignore the tire tag and look at the VIN tag instead. That should tell you the GVWR and the GAWR. Then you can work from there.

 

[Ranger Bob]

I suggest you go up to 18" wheels. Toyo Open Country AT2's in a 35x12.50-18 are F rated with a load capacity of 3970lbs and 80psi. These will meet your factory specs. The Cooper Discoverer STT Pro 325/65r18 are load range E rated 3860lbs and 65psi. They are slightly under your factory spec but, would serve you pretty well (maybe a little noisy compared to an all terrain). I use Tirerack.com to do research. They have the detailed specs for just about every tire.

Bob

 

[verdesard0g]

Here's a tire load chart

 

[andy_b]

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If you had the original wheels and wanted to stick with the original size, Toyo makes their Open Country RT in that same size, 285/60-20, that is rated for 3640lbs per tire. My understanding is that the difference between the AT3 and RT is that the RT's carcass is based on the mud terrain so slightly more durable. I have no idea if that is true and no means to prove it. I've used the RT for about 600 miles thus far and I think they ride great. Subjectively as quiet and smooth as BFG ATs, maybe slightly better but these are still too new to give a fair comparison.

Otherwise, the recommendation to go to an 18 would yield more variety. This process can be a real PITA.

 

[Luckychase5]

If you had the original wheels and wanted to stick with the original size, Toyo makes their Open Country RT in that same size, 285/60-20, that is rated for 3640lbs per tire. My understanding is that the difference between the AT3 and RT is that the RT's carcass is based on the mud terrain so slightly more durable. I have no idea if that is true and no means to prove it. I've used the RT for about 600 miles thus far and I think they ride great. Subjectively as quiet and smooth as BFG ATs, maybe slightly better but these are still too new to give a fair comparison.

Otherwise, the recommendation to go to an 18 would yield more variety. This process can be a real PITA.

Ha! Ya, I’m learning that!
And I want a snowflake rated tire. The Toya AT3 has the three mountains one, so that would be cool. Other top contenders are BFG KO2 and Cooper AT3 XLT


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[andy_b]

Ha! Ya, I’m learning that!
And I want a snowflake rated tire. The Toya AT3 has the three mountains one, so that would be cool. Other top contenders are BFG KO2 and Cooper AT3 XLT


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The RT has similar snow ratings, FWIW. My experience with the BFG KO2 in the snow is: don't expect much lol. They are better in the snow than an MT but still not as good as a real snow tire.

The reason I went with the RTs vs AT3 (either Cooper or Toyo lol) is my perception of the benefit of sidewall toughness for heavier trucks like ours. That's what made me go for the MTs originally. While I don't regret that choice, the highway portion of any trip got old on the MTs fast. Hopefully the RTs will be a good balance.