TV Tires with Extra Load Capacity

[mail2us]

I didn't want to step on Roger's (MacDR50) post concerning extra load tires for his new truck...
My question is where or how is there info relating to extra load capacity on truck tires.

Ex: I have Bridgestone Duravis M700's - 265/70R/17's (E) with a load capacity of 3195 lbs. I used my brand and could not find a Bridgestone with a 3400 lbs rating?

What tire company has higher load capacities? than my current tire?
The tires seem fine but just curious about this load capacity issue?Dennis

[MacDR50]

Dennis:
This is a good link for tire load and inflation data. http://hmcclub.homestead.com/Goodyea...oad_Charts.pdf

Many tire manufacturers make the 265/75/R16. Not all have a max. inflation of 80#. I am leaning to either Goodyear Wrangler SR-A or Bridgestone Duravis M773II. Michelin makes the LTX M&S in the higher load range and another possibility is the Pirelli Scorpion SRA. Using the formula of size in width (265) X aspect ratio (75%) x 2 for the two side walls with the result converted to inches by dividing by 25.4 then + the rim diameter (16), this tire is the same height as your 265/70/R17's. 31.6. Of course the rims are different and this accounts for the 1 inch. Its max. load at 80 psi is 3,415 lbs versus as you have said 3,195 for the 17 inch tire..

[mail2us]

Looking at the Goodyear chart in your post, if read correctly, does not list a 17" tire @ 3400lb load capacity. Is that correct? I also believe Duravis did not have a 17" in their chart. So what is done when I consider a new tire that I would like a higher load capacity with 17" rims? Dennis

[LonnieB]

quote:My question is where or how is there info relating to extra load capacity on truck tires.

When MacDR50 is talking about going with LT265/75R16E vs LT245/75R16E to get the extra load capacity, he isn't saying he has found tires with an EXTRA load rating. The LT265/75R16E DOES have a higher load rating than the LT245/75R16E, but ONLY because it is a wider, and taller tire.

quote:Ex: I have Bridgestone Duravis M700's - 265/70R/17's (E) with a load capacity of 3195 lbs. I used my brand and could not find a Bridgestone with a 3400 lbs rating?

What tire company has higher load capacities? than my current tire?
The tires seem fine but just curious about this load capacity issue?Dennis

Sorry Dennis, you will not find a LT265/70R17E with a load rating of 3415 lbs. Although the width of your tires (265mm) is the same, the sidewall height of your tires is only 70% of the width compared to 75% on his. The sidewall height is a determining factor in the load carrying capacity, and the sidewall height on the 16 inch tires is 1 inch taller than the 17 inch.

I hope I haven't confused the issue too much, but if I have let me know, I will try to clarify it.

[mail2us]

Lonnie,

So in my simple tire-less mind, to get to a higher load capacity the tires on my truck should have been at least 75/16's instead of 70/17s? Dennis

[firetrucker]

The vertical load capacity of your truck is not solely determined by the ratings of your tires, but primarily by the GAWR (gross axle weight rating) and GVWR (gross vehicle weight rating). You can exceed the GAWR without exceeding the GVWR, and the GVWR without exceeding the GAWR, so it's a bit of a balancing act. Than you have to worry about the GCWR (gross combined weight rating) of the truck and trailer.

Not that everyone stays under those ratings, but it gives you a good picture of what stresses can be put on your vehicle's suspension and drive train and how you may be affecting the reliability.

Bob

[MacDR50]

Bob is right but in the case of the 2500HD that I bought the limiting factor was the load rating of the tires. Those tires kept me to 2308# of payload including passengers. The truck can carry over 2600 according to the GM specs, checked with a knowledgeable dealer. In other words the truck can carry more load without going over the GVWR or the RGAWR but not with the 245/75R16 tires. To get the most out of the truck I needed to upgrade the tires. With the new tires, Timbrens and perhaps 7 inch rims I will feel safe with a total payload near that of a 3500HD SRW, approximately 3000#'s. DISCLAIMER: These are my calculations for my own peace of mind. I do not recommend them to anyone else. My comments are for discussion and interest only. BTW thanks Lonnie for helping. A tire man can explain things much better than an amateur like me.

[TLightning]

quote:Originally posted by MacDR50

Bob is right but in the case of the 2500HD that I bought the limiting factor was the load rating of the tires. Those tires kept me to 2308# of payload including passengers. The truck can carry over 2600 according to the GM specs, checked with a knowledgeable dealer. In other words the truck can carry more load without going over the GVWR or the RGAWR but not with the 245/75R16 tires. To get the most out of the truck I needed to upgrade the tires. With the new tires, Timbrens and perhaps 7 inch rims I will feel safe with a total payload near that of a 3500HD SRW, approximately 3000#'s. DISCLAIMER: These are my calculations for my own peace of mind. I do not recommend them to anyone else. My comments are for discussion and interest only. BTW thanks Lonnie for helping. A tire man can explain things much better than an amateur like me.

If your truck is an 05 or newer, the ONLY place you can find the actual cargo capacity for THAT truck is on the Tire and Loading Information sticker on the left rear door post.

[mail2us]

In attempting to somewhat understand TV tires, the following is offered up for further input from you all:

Our truck is a 2007.5 Chev 2500HD (New Body)Duramax CC, Z71 4X4

Tires: 265/70R/17's (OEM)

GVWR: 9200 lbs
GAWR F: 4800 Lbs
GAWR R: 6084 lbs
Rim: 17X7.5J

Cargo cap: 2224 lbs passengers and cargo

The tire load capacity for the Bridgestone M700 Duravis tires is 3195 lbs

Doesn't all this tie into the vehicle capacity and the tires placed on it from GM? as it relates to load, cargo, etc?

I was confusing my truck with Rogers on his thread and believe he has a different model 2500HD, like extended cab?? allowing that he can have load capacity tires of 3400lbs. ?? because his truck maybe lighter??Is that a fair assumption?

I seek your input...tks. Dennis

[MacDR50]

Yes Dennis, I have an extended cab so am slightly lighter than you.