Double butted aluminum U6 tubing with S-bend seatstays, extruded chainstay at the chainrings, flattened top tube, teardrop shaped downtube, replaceable hanger all of this for Cyclo-Cross performance. Redline carbon fork with aluminum steer tube, light and responsive at 565g. SRAM Rival shifters and derailleurs paired up to the FSA Gossamer 46 x 36t crankset for smooth shifting performance. Ritchey Pro wheel set with Hutchinson Bulldog tires will get you to the finish line over the toughest terrain. Available in 7 sizes (44cm-60cm) measured center to top.