How about checking the rim to be sure that is the problem?
Jack up the truck so a wheel is off the ground an inch or so is all you need (just do one at a time). Be sure one of the wheels still on the ground (or a couple) are "chocked" with a block of wood, a brick, or something in front and behind the tire on the ground so the truck doesn't roll off! Put the truck in neutral or and release the parking brake.
Get something that you can rest a screw driver or chisel on like a brick. I use a quart paint can and a chisel, that is what we will use in this discussion.
Place that can next to the wheel that is up off the ground and place the chisel on it so that the tip is right next to the outermost lip of the rim. I like it as close as possible and will turn the rim until there is a ballancing weight (if there are any on the rim, I do it with aluminum rims as well) so that I can put the chisel right up where the weight is and then spin the wheel so it is barely missing the weight.
DON'T touch the chisel, let it set there on the can. You rotate the wheel and can see exactly how much the rim is bent because the gap between the rim and the chisel will change if it is.
You can check if it is going side to side as well as up and down.
If you find it is out more than a 1/16" or so you should have concern.
If you do, you may want to narrow it down to the rim for sure because it may be a hub or axle that is actually bent. To do that, mark the wheel where the gap between the chisel and rim is the most. Also, mark one wheel stud and on the rim next to that marked stud. Now remove the wheel and re-install it with that marked stud on the opposide side of where it was before. Now, do the run-out test again using the chisel on the can. If the widest point between the chisel and the rim is at the same spot you marked before, the rim is bent and the axle or hub is straight. If it is the opposite side of the mark you put, the hub or axle is bent.
Let me put it this way, I think you will find that the rims are ok. These rims are VERY strong from what I have found and the large tires are very easy to be out of balance and causing the problem.
Brian
