Tires - Need some help understanding load, etc..

[Regcabguy]

Hello all. I recently upgraded from my 4th gen 1500 or a 5th 2500 Laramie CC. I am looking at tossing the twentys that came on the truck, and order up a set of 17x9.5 with 35x12.5 rubber.

But, I understand the HD trucks carry a different load rating with their tires. I am looking to run a good A/T tire like Mickey Baja or Wildpeaks. My question is....do I need to get a F load rated tire, or E? 8 ply vs 10 ply?

If I ran an E rated tire, will the dash be constantly telling me my pressure is low? I do have Alpha OBD, so I could probably find a setting for that.

Any education on this is appreciated!

Thanks,
Nathan

All the flotation tires are E rated. LT's can be D's. You don't need an F unless you're carrying a heavy camper. I'd compromise and get 18's with a 3/4 ton. Way higher load capacity than 17's with the exception of the Toyo MT's 35-12.50-17. They have a 124 load capacity. I'm returning to 285's. My 35's killed my fuel economy.

 

[Nado]

Well the load capacity of 17s falls right in line with the GAWR for the rear of the truck. So do I really need a tire that can handle more than what the truck is rated for?

 

[OC455]

it is important to confirm that the Load Index in the tire's service description of the new tire is equal to or greater than the Load Index of the original tire and/or that the new tire's rated load capacity is sufficient to carry the vehicle's gross axle weight ratings.

 

[14hemiexpress]

Well the load capacity of 17s falls right in line with the GAWR for the rear of the truck. So do I really need a tire that can handle more than what the truck is rated for?

the answer to that is no you don’t need a tire that can handle more that what your axle ratings are for. It will be a softer tire and good for off road( the power wagon has D tires factory) but will flex faster and will feel squishy under heavy loads, but it will handle it.

 

[Nado]

So...load range ratings. Would an E1 be better than an E2 or vice versa? Doesn't the number of equivalent plies in the construction make one a better option that another?

 

[SargeRN]

Here is what I want to do. 2021 Ram 2500 Cummins Turbo, crew cab, 4x4, 8 ft. bed. Current tires are the stock 285/60R/20's . What issues am I going to run into by putting on 35X/12.5's ?? If I need to remove the inner wheel well liners on the front no problem.
Sarge

 

[OC455]

So...load range ratings. Would an E1 be better than an E2 or vice versa? Doesn't the number of equivalent plies in the construction make one a better option that another?

Load Range E1 10ply tire, max load carrying capacity at 80psi
Load Range E2 still a 10ply tire, max load carrying capacity at 65psi.

I think that the E2 has a stiffer side wall compared to the E1 if you are able to run at a lower pressure to be able to carry the same weight.

Depends on what you are looking to do.

 

[OC455]

Here is what I want to do. 2021 Ram 2500 Cummins Turbo, crew cab, 4x4, 8 ft. bed. Current tires are the stock 285/60R/20's . What issues am I going to run into by putting on 35X/12.5's ?? If I need to remove the inner wheel well liners on the front no problem.
Sarge

You would be an inch & half taller and one inch wider than the OE tire if you ran a 35x12.50R20. I think you might be ok, but check and see if there is a need for a level on the front.

 

[lpennock]

Load Range E1 10ply tire, max load carrying capacity at 80psi
Load Range E2 still a 10ply tire, max load carrying capacity at 65psi.

I think that the E2 has a stiffer side wall compared to the E1 if you are able to run at a lower pressure to be able to carry the same weight.

Depends on what you are looking to do.

E2 carry the load at a lower pressure because they have more volume due to being a wider tire, not because the sidewalls are any stronger. Wider tires have more square inches so less pressure needed to provide same force to the ground.

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