I will be purchasing new tires in the near future. I was looking at getting 35" mud grapplers, but upon doing more research i see that IROKs weigh 15lbs less in their 36" (website says actually measurement is 36.8) I wasn't planning on going that big. However, I thought I'd throw out this question. Which will strain the D30 more the 35" at 81lbs or the 36.8 at 66lbs. Not looking to start the 37s on a D30 debate, plenty of threads on that.

 

i read a discussion on this on another forum that had lead to split decision lo half was for weight and half was for size. there was one guy that did a big post using all kinds of formulas about rotation and weight and it was a very intelligent post. it pretty much came down to that size is a larger factor but if the smaller tire was extremely heavier than the larger then it would cause more stress. i cant remember the amount of weight it would take to over come the height but it was relatively significant

 

I am running toyo mt 285/75/17- 97lb.just the tire . And am all good with it.

 

I'm currently running 33" Hankook mts which are only two pounds lighter than the 35" Mud Grapplers. I agree this weight is doing fine, but i figured maybe since the 36" was lighter, it would be better.

 

Either one of them is going to stress the D30 and potentially put you at risk of breaking your front axle if you do any serious off-loading. You probably already realize that is a possibility, although I think the D30 is ALOT stronger than most folks are giving it credit for.

I don't think you will have much of a problem either way if its a DD with occasional off road use. Go for the ones you like the most.

 

larger tire size = more leverage...this is what breaks axles,lockers ring and pinions etc...the larger the tire the more strain you put on those little d30 27 spline shafts and r&p...think of the larger tire as a breaker bar,the larger the bar the more force it will exert...

 

Exactly. I see in no way how more weight is more likely to damage an axle. The engine is what's applying the forces.

 

well its a proven fact that more weight cases damage

 

Science? I guess?

I'm not saying no for sure, I'd just like to know how.

 

x2. Couldn't have said it better.

A perfectly balanced tire will cause no damage period, as all forces are in balance with another. However, in practice it is incredibly more difficult to balance a heavier tire. Also, the machines they use to balance the tires aren't, and can't be exactly precise.. They don't go freeway speeds, they don't place the weight, a human does, and they also can't stop weighs from falling and imbalancing everything. However, none of that changes the fact that regardless of weight, the larger tire will always put it's same strain on the axle every time.