The Bombtrack Audax is a premium audax bike built with Columbus Cromor double-butted tubing. The slim tubes recall classic steel audax bikes, but it is fully up to date with a tapered head tube, T47 bottom bracket, 12mm thru-axles, a rear light mount and rack mounts on the frame. Shimano's GRX 600 2x groupset handles shifting and braking, with GRX 810 front and rear derailleurs and a sub-compact chainset. 650 x 47mm WTB Byway TCS tyres and Ritchey Comp finishing kit give all-day comfort.