State's deluxe race-ready Single Speed Cyclo-Cross bike the Thunderbird boasts the versatility and power any serious SSCX rider needs: lightness, agile maneuvering, a 6061 aluminum frame with a carbon fork that begs to be punished, serious stopping power, custom-graphics by Johnny Hsu, and some of the most trusted components in Cross. Want to ride geared? The Thunderbird gives you the ability to add a rear derailleur.