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Old 03-30-2013, 06:45 PM   #1
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Tires and D35

Here's a question I haven't seen addressed before. I'm kind of a Toyo tire fan. Have them on all my cars and they have been really good tires. I currently have Toyo 305/70R16 (approx 12x33) High Country AT's on my Wrangler and actually had no problem doing the Rubicon with them last year. I'm thinking about going to an MT tire, and I really like the Toyo MT's. I've talked to a couple of people that run them on their Jeeps (Dana 44's) that love them. My concern is that they weigh in at like 71 3/4 pounds each where Duratracs are in the 63 pound range in that size. Do you think there will be a ton of extra stress put on my Dana 35 by the extra 9 pounds per tire? The AT's I have now weigh in at about 66.

Blast away with your thoughts....

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Old 03-30-2013, 07:27 PM   #2
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The more stress u out to the turdy5 the likely it s to fail

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Old 03-30-2013, 07:37 PM   #3
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Based on my knowledge of physics and also practical experience, I would say tire weight only plays a part when it comes to highway driving, perceived power, and when spinning tires offroad. The actually force on an axle during a high traction moment is a function of the size of the tire acting as a lever bending/twisting the axle shaft, opposing the torque provided from the drivetrain into the gears. So a same size tire should cause the same amount of force when in a high traction scenario, the weight would be negligible. However when spinning a tire you have more momentum with a heavier tire, or a larger tire either way. When that tire suddenly gains traction you are stopping more force.

The lesson here is you can run a heavier tire, it will affect perceived "power" on road and may drop your mpgs. You also have a better chance of breaking something if you are a tire spinner. If you are a crawler, you shouldn't see much of a difference.

All this is my opinion and subject to debate.
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Old 03-30-2013, 08:10 PM   #4
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Originally Posted by GoldenSahara00 View Post
Based on my knowledge of physics and also practical experience, I would say tire weight only plays a part when it comes to highway driving, perceived power, and when spinning tires offroad. The actually force on an axle during a high traction moment is a function of the size of the tire acting as a lever bending/twisting the axle shaft, opposing the torque provided from the drivetrain into the gears. So a same size tire should cause the same amount of force when in a high traction scenario, the weight would be negligible. However when spinning a tire you have more momentum with a heavier tire, or a larger tire either way. When that tire suddenly gains traction you are stopping more force.

The lesson here is you can run a heavier tire, it will affect perceived "power" on road and may drop your mpgs. You also have a better chance of breaking something if you are a tire spinner. If you are a crawler, you shouldn't see much of a difference.
Thanks GS, Excellent points. I'm definitely not a tire spinner and drive it more like a tractor on the trails. As far as MPG, I don't put enough miles on it to worry about that. Even my freeway speeds are normally 60-65.

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All this is my opinion and subject to debate.
That is exactly what I'm looking for. The more views on the subject, the more info I've got to make a decision with.
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Old 03-30-2013, 10:25 PM   #5
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You could add chromoly axles for additional insurance...

IMO the extra tire weight will not be a factor on trails as the additional stress due to tire weight at such slow rotational speed (even spinning) is negligible compared to the weight of the jeep.
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Old 03-30-2013, 11:56 PM   #6
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You could add chromoly axles for additional insurance...

IMO the extra tire weight will not be a factor on trails as the additional stress due to tire weight at such slow rotational speed (even spinning) is negligible compared to the weight of the jeep.
Great idea about the axles...I've actually thought about that previously, but it might be a good time to actually do it.
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Old 03-31-2013, 01:48 AM   #7
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I currently have 33x12.5x15 Toyo open country M/T tires with a 4" lift (tires not my choice previous owner bought them). I've tested them in the mud and they are not worth the money. you are better to go with a KM2 or goodyear tire. Now I'm not a Toyo hater great street tires they just can't make mud tires. Also with running a Dana 30/35 it definitely puts a lot of stress of them at highway speeds but do great at lower speeds. I'm sucking in at 12 mpg at the moment until i can afford to regear to either a 4.56 or 4.88 to help with carrying the heavy ass tires.
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Old 03-31-2013, 09:58 AM   #8
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I currently have 33x12.5x15 Toyo open country M/T tires with a 4" lift (tires not my choice previous owner bought them). I've tested them in the mud and they are not worth the money. you are better to go with a KM2 or goodyear tire. Now I'm not a Toyo hater great street tires they just can't make mud tires. Also with running a Dana 30/35 it definitely puts a lot of stress of them at highway speeds but do great at lower speeds. I'm sucking in at 12 mpg at the moment until i can afford to regear to either a 4.56 or 4.88 to help with carrying the heavy ass tires.
Thanks, good to hear from someone that runs them. How do they do in the rocks aired down? I don't really play in the mud. I think you will be pleasantly surprised by regearing on your MPG and find that your bad mileage has more to do with tire diameter than weight. Mine is a 4.0L, 5 spd and when I regeared to 4:56 my mileage went from around 12 to around 15-16.
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Old 04-02-2013, 01:29 PM   #9
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Thanks, good to hear from someone that runs them. How do they do in the rocks aired down? I don't really play in the mud. I think you will be pleasantly surprised by regearing on your MPG and find that your bad mileage has more to do with tire diameter than weight. Mine is a 4.0L, 5 spd and when I regeared to 4:56 my mileage went from around 12 to around 15-16.
I haven't had a chance to really test them on rocks yet. gotta wait for the snow to melt first.
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Old 04-02-2013, 02:01 PM   #10
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I have gone through 2 sets of Toyo 33x12.5x15's on my Jeep when it had an open D35. Pretty good tire for a dual purpose Jeep. They worked good in most conditions, and I had no problems airing way down to 5psi in the snow. The negatives for me is the same as other posters... they don't clean out very well in mud, and they are really heavy. The 35's I have now weigh less than my old 33" Toyos. Toyo also makes a 33x10.5x15 that would save some weight.



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