The Bombtrack Audax AL is a lightweight aluminium audax bike with a hydroformed double-butted frame and full carbon fork. The butting is optimised to save weight, the top tube is ovalised and the seat stays are dropped for extra compliance. Frame and fork have mudguard mounts and plenty of mounting points for travelling fast and light. Microshift's 11-speed drivetrain uses a 40T chainring, 11-46T cassette and clutch rear derailleur, and WTB Horizon 650B x 47mm tyres smooth out rough surfaces.