Tire aspect ratio

agesilaus wrote:
?? you're saying a LT275/70R18 cannot be E rated? Why not?

If you were replying to me, no.

I am saying a "P275/70R18" tire cannot be E rated. E is a rating for LT tires, not P tires.

Your first post stated that the "P" tire was rated load range E, as quoted.

To further complicate the issue, tires are now all rated with a "Service Description" regardless of P or LT. This consists of a load index and a speed rating, a three digit number (or two) and a letter.

https://simpletire.com/learn/tire-buying-guides/tire-service-description

agesilaus wrote:

Grit dog wrote:

agesilaus wrote:
?? you're saying a LT275/70R18 cannot be E rated? Why not?

You’re confusing yourself even more. That size tire IS predominantly made in E load models.
However eliminate all confusion of LT vs whatever, ply rating , letter designation and just use load index if you’re having trouble understanding the other more generic classifications.

I am not confused, I was uninformed but that was taken care of 10 or 12 posts back, and you have not explained that strange claim about 275 tires. But I see the post was edited to add a P to the 275

Then maybe I'm confused....(not about tires, jsut about your understanding). You just asked the question I replied to, 3 posts back...:S lol
And there are not strange claims...tire load ratings are about as black n white, objective and qualitative as something can get.

Grit dog wrote:

agesilaus wrote:
?? you're saying a LT275/70R18 cannot be E rated? Why not?

You’re confusing yourself even more. That size tire IS predominantly made in E load models.
However eliminate all confusion of LT vs whatever, ply rating , letter designation and just use load index if you’re having trouble understanding the other more generic classifications.

I am not confused, I was uninformed but that was taken care of 10 or 12 posts back, and you have not explained that strange claim about 275 tires. But I see the post was edited to add a P to the 275

If the size has an "LT" in front of it, it's a light truck rated tire. It can have a C-6 ply, D -8ply, or E-1ppky rated tire. The C will have a lower capacity than a D, D is lower than an E.
If a "P" is in the front, that is the lowest payload rated tire if it can fill to 32_36 psi. Their is an XL version, that can handle 45 psi. That tire is more like a C rated tire in capacity.

So as grit mentioned, unless you look at the actual load ratings, you won't know if the tire has the ability to carry the load you need.

In my tire size, an E can carry 3700+ lbs per tire. A P/XL tire 2500 lbs per. This is a 1000 lbs over my spring capacity. 2 XL tires could carry my truck fully loaded at 7200 gvwr door sticker wise. Issue I have, is the size ONKY comes in 10pky E rated tires. I'm over tired bt 2x capacity.

Marty

agesilaus wrote:
?? you're saying a LT275/70R18 cannot be E rated? Why not?

You’re confusing yourself even more. That size tire IS predominantly made in E load models.
However eliminate all confusion of LT vs whatever, ply rating , letter designation and just use load index if you’re having trouble understanding the other more generic classifications.

?? you're saying a LT275/70R18 cannot be E rated? Why not?

IMO...boils down to whether a person believes in the OEM specifications or not

If yes, then follow them and things like warranty will apply

If no, then do whatever and things like warranty may not apply...unless that person lies about following the specification...

agesilaus wrote:
LTX A/T 2 Tire
Light Truck, SUV/Crossover All Terrain
P275/65R18
Load Capacity 3640 Pounds
And below it says load range E
But that is for the 275/65

And Michelin makes a
Size: LT275/70R18 125/122S E
Style: Blackwall
Load Range: E
Serv. Desc: 125/122S
UTQG: None

So I don't know why it's not shown. I'll call tomorrow

A P275 tire would not be rated "Load Range E."

So you're mixing your metaphors here...

Go Grit...right on, even 3/4 example! While de-rating, of wrong tires, can be needed, why bother, just get the proper tires, and done.

Jerry

^Great, but the OP needs LT tires.
PS , I’ve heard the de-rating nonsense on here for years. It’s laughable. Akin to 1800lb payloads in 3/4 ton trucks. Just regulatory nonsense.