Alex Hiam pro signature model. Full Colonized CroMo tubing. Unique seatstay design for saving weight. A couple point were updated on the latest model including longer headtube length, so you don't have to use spacers under your stem, beefed up 6 mm thick CNC'd dropouts now with built-in chain tensioner. Standover height raised slightly, giving the frame stability. Integrated seattube clamp design, removable brake hardware. Tapered down tube, top tube & rear stays. New rear triangle design fits 2.4" tires easily.