Davidk,
My first Michelin Primacy Alpin I ran at 41 psi and it only lasted 27,850 miles. The sides had good tread but the center was down to the wear bars. I now have 6,000 miles my second Alpin and running 32psi the wear is even across the tire.
I'm very pleased with the performance and handling. I picked up a screw on a trip last year and it seemed to be a good bit harder to get a plug into this tire.
Happy riding on your Alpin.