For what conditions?cptjack said:What 2.3 sized tire has the best grip, reasonably light, and is the fastest rolling.
(Shiggy---I know you are rolling your eyes, but think of it as a test question )
And what size "2.3"? Those with "2.3" on the sidewall or have an actual casing width of "2.X" or actual tread width of "2.X"?
If you must have an answer: Schwalbe Super Moto 2.35, 690g, Use it on the beach, clean hardpack and pavement.