The premium model with 2x drive and racing handlebars for gravel bikers who want the Topstone CAAD feeling with a larger gear range for an optimal cadence at all times. The Topstone CAAD 1 GRX 2x combines the same premium aluminum frame and carbon fork – with space for 52 mm wide tires (measured) and many clever mounting points – with Shimano's GRX 610 2x12, WTB i25 wheels with WTB Vulpine 45 tires, and a tidy Conceal cockpit. For gravel bikers who want to tackle fast gravel roads, smooth asphalt, hilly terrain, and bikepacking trips on a mature aluminum gravel bike without compromising on distance.