for my China I run a 26" wheel and the Hookworms out perform any tire that I have tried. I've run the Bontrager 'kojaks' which i plain wore through during practice, and 'hanks' which I liked but I need to run a thinner tire, Michelin 'pilot sports' got slippery during the main. so for me Hookworms are best, unless you consider the Hutchinson GP1 tires I run on my H2o Morini.
I run my tires by feel, I'm going on the 3rd race with the hookworms.