10 ply question

[dblxx]

First post,


I have a 85 K20 235/85/16 E tires. The door sticker recommends minimum 44 psi front 51 psi rear for a nearly empty truck.

I have between 3140 lbs front 2860 rear to 3140 front 3600 rear.

My question is do 10 ply tires heat up more or faster than say 6 ply tires?

I have been running 50 psi front 60 psi rear and I am wearing out the centers and taking a beating.

[Captkaos]

If you are wearing out the centers you have too much air in them.

[Chevalade]

Jeeze.....use the recommended pressure on the tire....not the door of the truck. You prolly won't use more than 40 psi in them. And 10 ply tires are for weight rating, and no they will not heat up more than 6 plys with lots of weight.

[Donut]

First post, Welcome 

What they both said.  Wearing the centers is too much air, and go by the pressure on the tire.  I'm not sure, but I believe Firestone and Ford had an issue over this.  (my facts could be completely wrong)

FWIW, the 6 ply "E's" on my truck call for 80 psi (cold). 245/75-16

[choptop]

I thought "E's were 10 ply. "C's" are 6 ply

[Donut]

That's what I thought too, now you've got me hunting.  It MAY have something to do with the air pressure in them also 

Looking outside (it's dark you know)  The "E's" on my truck (m/s in case it matters) are 6 ply, 80psi, rated @1350 pounds single.
These are them http://ssl.delti.com/cgi-bin/rshop.pl?dsco=135&Cookie=shoppingcom_Republic&details=Ordern&typ=R-120716&ranzahl=4&nichtweiter=1

My old dryrotted ones (came with the truck) have a "D" rating 8 ply, 65psi, rated (iirc) 2350 pounds single.
(When I went shopping for tires I asked for aggressive tread and load range "E"  )

Now I'm thinking that the letter rating on tires is the same as the HP rating on an air compressor.  (junk)

"Load Range

Load Range is another way of indicating the ability of a tire to handle stress and weight. This time, we are indicating how much load can be placed on the tire horizontally. Often, these tires are associated with towing because the back end of the car tends to wallow while towing a trailer. In other words, you are exerting stress on the tire from side-to-side.

While there is no industry-wide definition of ply rating, truck tires are frequently marked with ply rating and equivalent Load Range. These markings are used to identify the load and inflation limits of that particular tire, when used in a specific type of service:
Load Range"
   
Clipped from http://www.dualport.com/bustech/load_tires.html

[bmaier]

Load Ranges:
P = 4 ply
C = 6 ply
D = 8 ply
E = 10 ply
F = 12 ply
and so on...but for pickups the biggest load range needed is a 1o ply (E).

[dblxx]

Thank you for the response's

Chevalade wrote: "Jeeze...."

 
 My thoughts exactly. When I bought the truck the owner said I could run 45 psi if the truck is empty. When I bought new tires they put 65 psi front and rear. I asked why and was told "they go to 80" Then when the center starts to wear they tell me I'm over inflated [duh!]. So I was just wondering at 40 psi if I will have blow out at 75 mph. I don't know any one with 10 ply.

[84ramcharger]

I'm running the same size tire , I've runing at 40 psi also . I just got this truck not to long ago (80 gmc 2500) My father in-law said it's what he runs in his 10 ply's (got the truck from him). I just had the front tires replaced and my tire guy put 40psi in too .

[choptop]

Something sounds odd here. I run 60-65 psi in all but 2 of my trucks, and all but 2 have 10 ply tires. I do not have wear problems with the center on any of them, in fact on Oldyellers 01 extendedcab, we ruined a set of 10 ply tires running them at 40 psi, and it was the outside that was destroyed. Only tires I ever had wear on the inside, were 6 plies that had about 60 psi in them. ( bad when I was younger and didnt understand air pressure requirements) Double check your tire label,since you said it was dark, it almost soubds like you have c's on your truck

[VileZambonie]

If you are running the correct tires you should go by the tire placard not by what's on the sidewall of the tire. The pressure on the tire is for max load inflation.

[dblxx]

 Again thank you for the replies.

  The tires are 235/85/16 E the side wall reads 80 psi max. The centers are wearing. I will drop the pressure a bit and see how it goes.

Regards

[malibu795]

i have 285/75/16 tires rated at 3300lb... max PSi is 60... im riungin mid 30s front low 30s rear when empty.. little higher i the front for increase steerign response..

take a truck 4000 FAW and  2000RAW and a tire rated @ 3300lb @ 60psi.. this is what i do..

6600lb tire cap on and axle.. 4000/6600=.60 or 60% of the total tire capcity for said axle is beign used..

60% of 60psi is is 36psi...

rear 2000/6600= is .30 or 30% of 60psi is 18psi... IMO i woudl run a tire that low on the street... about 25psi would be the lowest i would go...


this would promote good tire life/wear

i think you get the idea...

[Grover 1]

Might not make a difference in how it wears now, once a bad wear pattern is started it's hard to change it.

[bmaier]

Might not make a difference in how it wears now, once a bad wear pattern is started it's hard to change it.

x2