The Trek Boone 9 Disc is Trek's fastest, smoothest, lightest
Cross bike ever, with competition-crushing race geometry and our
exclusive course-smoothing IsoSpeed technology. With electronic
shifting courtesy of Ultegra Di2 and hydraulic disc brakes -
Shimano RS785 - the tech and performance is at the top end of it's
game. HED's wide Ardennes rims keep the stability optimised.