The BMC Kaius 01 Four represents the pinnacle of gravel racing performance, engineered for riders who seek unbound speed across all surfaces. This is your journey, your path, your pace, where there are no obstacles and every ride is a race. Built with one singular purpose, to be fast on gravel roads, the Kaius 01 Four crushes the competition through BMC&';s obsession with gravel speed, delivering the perfect combination of weight, stiffness, compliance, and aerodynamics. Engineered in BMC&';s Impec Lab with cutting-edge carbon technology, the Kaius 01 Premium Carbon frame features an innovative premium carbon layup using ultra-high-module fibers for unmatched stiffness and maximum power transfer while minimizing weight. The frame weighs a mere 910g as part of a complete 1,785kg module (including 400g fork, 160g seatpost, and 315g cockpit). High-strength fibers achieve compliance and robustness through BMC&';s Tuned Compliance Concept Race Technology, ensuring comfort on rough surfaces while providing requisite strength for peace of mind against stone strikes. Race-tuned gravel-specific geometry features a longer reach that shifts the front wheel forward to improve stability and increase traction on loose surfaces. Combined with a shorter stem providing responsive handling, the Kaius sports progressive geometry for ever-evolving riding styles that harnesses the precision of BMC&';s leading road technologies while ensuring front-end stability at speed. The SRAM Rival XPLR AX E1 wireless electronic drivetrain delivers precise, reliable shifting across varied terrain, while the CG 40 Carbon tubeless-ready wheelset with 40mm depth provides aerodynamic efficiency and confident handling. Arriving at the highest level of integrated functionality, the Kaius features BMC&';s Aerocore design-an evolved solution that integrates bottle cages into the frame to optimize aerodynamic performance. Versatile by design, it accommodates 1x and 2x drivetrains, tires up to 44mm, dropper posts, and top tube bolt-on bags for maximum adaptability across scorched Spanish deserts or horizonless American gravel. Perfect for competitive gravel racers seeking to maximize performance while maintaining real-world versatility, the Kaius 01 Four is the trusted guide on every journey chosen-ready to chase podiums and push boundaries on every ride. Key Features Frame - BMC Kaius 01 Premium Carbon with Aerocore Design and TCC Race Technology Drivetrain - SRAM Rival XPLR AX E1 Wireless Electronic Wheelset - CG 40 Carbon Tubeless-Ready (40mm Depth)