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Tire tread a factor in tire size?

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Old 10-18-2010, 07:50 PM   #1
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Tire tread a factor in tire size?

Howdy.

Is a tire's tread-depth/lug height figured into the tire size?

Like if you had 2 tires, same brand and size, but one was a burly mud-tire and the other was highway tire and you drove both of them all the way bald, would both of the tires be the same size without the tread?

Would a 35" tire, for example, if everything was the same except for the tread all be the same height? if you had a 35" BFG mudder, all terrain, and road tire all sitting together, are they just as tall as each other? Or would the mudder be the tallest, AT second, and road tire 3rd tallest as ranked by tread size?
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Old 10-19-2010, 10:57 PM   #2
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Bump.

Does my question not make sense?
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Old 10-19-2010, 11:06 PM   #3
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usually they'll all be pretty close to eachother. m/t and a/t will run a tad taller but only about 1/4in or so tops
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Old 10-20-2010, 12:12 PM   #4
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I'm not sure where the manufacturers measure the tire size. That's a very interesting question.

I do know that between different models and manufacturers, the same stated tire size may have a different rolling circumference (overall circumference of the tire as it touches the roadway).
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Old 10-20-2010, 12:17 PM   #6
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Quote:
Originally Posted by nvdeserted View Post
Howdy.

Is a tire's tread-depth/lug height figured into the tire size?

Like if you had 2 tires, same brand and size, but one was a burly mud-tire and the other was highway tire and you drove both of them all the way bald, would both of the tires be the same size without the tread?

Would a 35" tire, for example, if everything was the same except for the tread all be the same height? if you had a 35" BFG mudder, all terrain, and road tire all sitting together, are they just as tall as each other? Or would the mudder be the tallest, AT second, and road tire 3rd tallest as ranked by tread size?

Pretty sure it varies per manufacturer. I really dont think there is a standard. One will measure it bald, one at full tread, and one half way between the two. It might even vary between different models in the same company.
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Old 10-20-2010, 12:19 PM   #7
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Quote:
Originally Posted by nvdeserted View Post
Bump.

Does my question not make sense?
No, it makes sense and I'm surprised someone hasn't come up with the correct answer yet. I've never thought about it but it's a damn good question, M/T's have some pretty deep lugs.
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Old 10-20-2010, 12:22 PM   #8
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Maybe one of our resident tire peddlers on here could answer this...interesting question!
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Old 10-20-2010, 12:35 PM   #9
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Quote:
Originally Posted by nvdeserted View Post
Howdy.

Is a tire's tread-depth/lug height figured into the tire size?
Yes
Quote:
Like if you had 2 tires, same brand and size, but one was a burly mud-tire and the other was highway tire and you drove both of them all the way bald, would both of the tires be the same size without the tread?
No (it would depend on the # of plys of the tire also)
Quote:
Would a 35" tire, for example, if everything was the same except for the tread all be the same height? if you had a 35" BFG mudder, all terrain, and road tire all sitting together, are they just as tall as each other? Or would the mudder be the tallest, AT second, and road tire 3rd tallest as ranked by tread size?
All the same height (with in reason)
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Old 10-20-2010, 12:40 PM   #10
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Quote:
Originally Posted by Lrgrnr View Post
On the last part I believe you're wrong, A mud terrain is truely taller than a A/T or road tire of the same brand.
Did you miss the within reason part?
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Old 10-20-2010, 12:42 PM   #11
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Old 10-20-2010, 12:44 PM   #12
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Quote:
Originally Posted by Lrgrnr View Post
Maybe

Depends on your definition of "within reason"?

It's kinda open ended.........CYA clause
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Old 10-20-2010, 12:47 PM   #13
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Quote:
Originally Posted by Lrgrnr View Post
Maybe

Depends on your definition of "within reason"?
The OPs original question was to find out the height difference between tires with various tread depths. So if you have 3 BFG tires an M/T, A/T and H/T, all the same size (say 265/70R17), are they the same height new or bald? Obviously there's not a huge height difference between them but the tread depth has to be accounted for somehow.
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Old 10-20-2010, 12:50 PM   #14
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Tread depth is NOT taken into account when talking about tire size. As many have said, it depends on manufacturer. Compare different style tires from the same manufacturer and you will see differences in actual size.

BFGoodrich for example; 31x10.50x15: Mud-Terrain = 30.8, All-Terrain = 30.7.
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Old 10-20-2010, 01:08 PM   #15
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Quote:
Originally Posted by Lrgrnr View Post
Why would they need to cover there asses when it comes to tire size?





So there's your answer OP, its up to the manufacterererererer, and all of them are different.............except for Goodyear, Dunlop, and Kelly.
Why is a 31/10.5 R15 not actually 31" tall?
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Old 10-20-2010, 01:10 PM   #16
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Quote:
Originally Posted by Lrgrnr View Post
It's under the CYA clause.

AH-HA!!!!!!!
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Old 10-20-2010, 01:11 PM   #17
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Why is it called a .38 when it's actually a .357 (.358) bullet?
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Old 10-20-2010, 01:14 PM   #18
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Originally Posted by Lrgrnr View Post
because it's a .358 and not a .357?
Same could be said with a .222 and .223. They use a .224 bullet.
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Old 10-20-2010, 01:23 PM   #19
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Old 10-24-2010, 07:59 PM   #20
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Thanks, I guess.
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