Drive heel toe wear.

I thought maybe we were discussing footwear....

 

I'd flip them around. No sense in wasting money on new tires if your old ones still have much more tread on them than the legal minimum.

 

Heel to toe wear on drives is normal. Note also that tires on the rear axle will always wear out faster than those on the front. And the right rears will wear down faster than the left rears. Anyways when there is about 5/32's difference between tread depth on the front axle & back I'll rotate mine in an X pattern - so the right rears will go on the left front and vice versa - to keep all the tires wearing evenly and get the most life out of them.

Rotating them in this manner will also smooth out any heel to toe wear. Balance beads are the only way to balance truck tires imo. If you have a shimmy you have other issues to address - balance & rotation are not your problem there. Worn out tie rod ends, worn out king pins, loose steering component pitman arm maybe, alignment off? Those things needs to be checked to find out what is the cause of your shimmy. Anyone that would do an alignment before checking for worn out suspension/steering components - don't waste your money. Seek out a good shop specializing in that - avoid T/A, Petro like the plague.

 

Would have to agree with most of what rollin coal said. Check your wheel bearings. They can be checked without pulling out. I would be interested in tire manufacturer. Some are notoriously bad. Belt deformation, balancing, out of round. Premium tires are much better as far as CPM, wear and balance issues. There initial cost may be higher, but are much less expensive over the long term. Heal toe is usually caused by excessive torque, especially when pulling empties. As far as shimmy, it is more than likely a steer balance issue. Vibration is a steer or drive, and possibly a trailer tire issue. Any tire not wearing flat can cause a vibration. I recently had my truck aligned at Petro on I69 north of Indy. best $217 ever spent. Since they are mainly focused on torque and thrust angles, it flattened my drive tires almost immediately. Most front end caster and camber adjustments are not easily done by shops. Usually only toe-in, inspection of joints, king-pins, and bearings. All which anyone can perform by hand with a large pry bar or tire iron and a tape measure. Most of the alignments performed by companies will involve inspections of the items mentioned above and torque arms and radius rods.