The Crux is the lightest gravel bike in the world with the exceptional capability of massive tire clearance and performance gravel geometry Its not just the ultimate expression of gravel performance its your one-way ticket to gravel enlightenment This Crux Expert comes specd with an intuitive and crisp-shifting SRAM Rival eTap AXS hydraulic disc groupset incredibly tough Roval Terra C Disc wheels and 2Bliss Ready 700x38mm Pathfinder Pro tires that hookup over nasty terrain