I've got a Kenda on my dirtbike. It seams to do really well for offroad, but a harder rubber is better for that terrain like everyone else is saying. On the street machine I'm running IRC Cheap, but pretty impressive. I put the "rear" on the front. Sshhhhh! don't tell my tire its in the wrong place.

IRC Tire


Aaron 04 "Green Bean" Freaked, AI removal, Bafflectomy, 6" Risers, and 30" Drag Bars.