So the cruiser has developed a bad vibration issue; its not the bearings, its not the driveshafts, its not the brakes. I can’t pin it down, but maybe I just found a huge clue.

Take a look at the pattern formed from a drive in the wet this morning. The edges of the shoulder blocks specifically. This tire and from what I can see only this tire, seems to be experiencing a block issue consistent with belt shift of stretch. Confirmed upon feeling the alternating different heights of the blocks. Hmmm. I started suspecting the tires after riding in my friends truck with a similar noise issue. In fact he has his hub bearings replaced on the same suspicion. I wonder if this is a bad batch or if it was damaged running too low a pressure at too high a speed. most interesting.