I am probably changing wheels within the next 6 months. Right now I am strongly leaning towards a 17" setup, primarily because of tire selection. Since I plan to drag race the bike a bit, I want a very sticky tire. On my other bikes I use Michelin Power Ones...but I don't think there is anything nearly as sticky in 18" sizes? What is the stickiest rear 18" radial out there, and what sizes does it come in?