Have any of you guys had a problem with sidewall flex with the BFG MT's? I am running mine at 40 psi, but I guess I could step it up to about 45psi and see if that helps. I had Michelin XCX APTs on there before and I didn't have these problems (same size 31-10.50 R15). Here is the situation:
I left the steel mill after another LONG 12 hour shift and zoned out coming up to a T intersection on one of the back roads. Well, needless to say I performed a panic stop however this one was different than usual. This truck has ALWAYS stopped very quickly and in a controlled manner, however since I bought these new tires the rearend gets really loose during hard braking or quick steering adjustments. Now listen, the tires DON'T lose traction they just start wiggling side to side. I have checked EVERYTHING before I blamed the tires, but now I am convinced because if you grab the end of the bed and give it a good shake you can watch the rearend wiggle for what seems like days. So I guess my main questions are have you had these problems and what psi are you running in these tires? 99% of the time this isn't a problem, but twice now conditions have warranted evasive tactics and the tires are the only thing not willing to comply. Any thoughts?

 

I run 45 PSI

 

> but now I am convinced because if you grab the end of the bed
> and give it a good shake you can watch the rearend wiggle
> for what seems like days.

I have the exact same thing with the Wild Country 31s I am running at 40 psi. My OEM Ford rims are only rated to 41, so I have no choice. 31s Load Rated "C" are meant to be run at 50-60 psi. Anything less and you will have a soft squiggly sidewall. On the plus side, at 40 psi I have great sidewall and tread flex with about 8 inches of tread on the ground, so when I drive over lawns I do not tear them up like I would if I ran a harder tire.

 

Yeah, makes sense but the only thing is my Michelins weren't this bad and they were only 2-ply sidewall. Oh well. I was checking tire pressure tonight and noticed a divot the size of a pencil eraser out of a side lug on one of the rear tires. AAARRRRRRRGGGGGGG! These tires aren't even a month old and have only been mudding once (and wouldn't have really called it mudding). The divot appears to have been caused by a downward force from the direction of the RIM. Don't know how that would have happened unless it was during mounting. Anyway, thanks for the input.