Never before has a high-tech road bike been so capable on low-tech roads. The Grade is ready for everything, from freshly-paved switchbacks to the gravel roads, and everything in between. The Grade knows no bounds. The Grade Expert features an alloy frame with smooth welds, hydroformed top tube and down tube, a tapered 1 1/8" to 1 1/4" headtube, standard BB, Shimano 105 drive train, and TRP cable actuated hydro disc brakes.