Got in a second ride with the previously mentioned, and recently mounted, Pirelli P-Zeros. They're not the most supple tires in the world, even when running them slightly lower than I used to run the Michelin or Schwalbe, but holy schnikes are they grippy as stink. It's the most glued-to-the-road feeling I've ever experienced. I almost feel like I could slam on the rear brake and go over the bars before locking up the tire.