Am I missing something or is this a perfect opportunity to invoke Avon's warantee? I thought they had some great road hazard thing where they replace the tire if it gets flatted within the first 2mm of tread wear or something like that.
Avon does have a great Road Hazard warranty, and I used it once to get a tire replaced - the only cost to me a few measly dollars to have it mounted.
However, the full replacement warranty is only good for I think - the first 1.5mm of wear. At 4000 miles, Unicycle52's tire was well past that window.