school me on tire load rating - Pirate4x4.Com : 4x4 and Off-Road Forum

solarpower · 01-04-2008, 09:56 AM

search has not resulted in the answers I was looking for.

I understand what the load rating means in technical terms..but I'm looking for a little more specific type..yet more "laymans terms" analysis.

I currently have worn down some E load rated MTR's. I'm not as concerned about on-road life and ride as I am about the likely hood of a bead breaking, and strength of sidewall while I'm scrubbing.

Is it safe to assume that a C rated tire would be "more likely" to fail by breaking a bead than a E rated in identical situations???

From what I have read so far it would also "seem" that a C rated tire would bend/flex more than a E rated tire along it's sidewall in identical situations. Is this correct???

Thanks.

Wild Hare · 01-04-2008, 11:22 AM

you are correct. e load tires have more plys in sidewall than c load tires. their ability to carry more load is based solely on sidewall strength.

jeepinTY · 01-04-2008, 05:37 PM

Tire "ply ratings" or "load ratings" no longer actually identify a specific amount of plys the tire has but rather the equivalent strength compared to when it did correspond to the amount of plys. A load range E or "10 ply" tire does not neccesarily have more carcass plys than a load range C or "6 ply" but is stronger and can hold more air pressure and weight.

To answer your question, yes the higher load rating a tire has the stiffer it will be....but in instances of tire scrub and bead breaking the difference will is usually negligible in larger tires.

01-04-2008, 09:56 AM	#1 (permalink)
solarpower Wheeler Join Date: May 2005 Member # 47722 Location: Toledo O-H-I-O Posts: 252	school me on tire load rating search has not resulted in the answers I was looking for. I understand what the load rating means in technical terms..but I'm looking for a little more specific type..yet more "laymans terms" analysis. I currently have worn down some E load rated MTR's. I'm not as concerned about on-road life and ride as I am about the likely hood of a bead breaking, and strength of sidewall while I'm scrubbing. Is it safe to assume that a C rated tire would be "more likely" to fail by breaking a bead than a E rated in identical situations??? From what I have read so far it would also "seem" that a C rated tire would bend/flex more than a E rated tire along it's sidewall in identical situations. Is this correct??? Thanks. __________________ Professional Driver. Closed course.

01-04-2008, 11:22 AM	#2 (permalink)
Wild Hare Granite Guru Join Date: Jul 2006 Member # 75473 Location: gillette wyoming Posts: 583	you are correct. e load tires have more plys in sidewall than c load tires. their ability to carry more load is based solely on sidewall strength. __________________ lead or follow, it doesn't matter. Just get the F@#$ out of my way!

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01-04-2008, 05:37 PM	#3 (permalink)
jeepinTY Granite Guru Join Date: May 2006 Member # 73191 Location: Winnie, Tx (SE of Houston) Posts: 765	Tire "ply ratings" or "load ratings" no longer actually identify a specific amount of plys the tire has but rather the equivalent strength compared to when it did correspond to the amount of plys. A load range E or "10 ply" tire does not neccesarily have more carcass plys than a load range C or "6 ply" but is stronger and can hold more air pressure and weight. To answer your question, yes the higher load rating a tire has the stiffer it will be....but in instances of tire scrub and bead breaking the difference will is usually negligible in larger tires.