The BMC Kaius 01 Four is a high-performance carbon gravel bike engineered for speed and resilience across demanding terrain. Built on BMCs lightweight Aerocore carbon frame with integrated cockpit technology and SRAM Rival XPLR AXS wireless shifting, its purpose-built for gravel racing and fast-paced adventures.

Specs at a Glance

• Frame & Fork: Aerocore Premium Carbon with ICS cable integration and TCC Race compliance; 12142 mm (rear) & 12100 mm (front) thru-axles)
• Drivetrain: SRAM Rival XPLR AXS 113 wireless, 42 T crank, 1046 T cassette, SRAM Press-Fit DUB bottom bracket
• Wheels & Tires: CG 40 carbon wheels (40 mm wide, tubeless-ready) with Pirelli Cinturato Gravel H 70040 mm tires
• Brakes: SRAM Rival AXS hydraulic discs with Centerlock 160 mm rotors (front/rear)
• Cockpit: BMC Integrated Cockpit System (RSM 01 stem + HB D4 03 alloy bar), fully hidden cables
• Extras: Aerocore carbon bottle cages, D-shaped carbon seatpost (15 mm offset), max tire clearance ~44 mm, system weight limit 120 kg

Geometry Highlights (Size 54 cm)

• Stack / Reach: 550 mm / 401 mm
• Wheelbase: ~1,015 mm
• Seat & Head Tube Angles: 73 / 72
• BB Drop: 135 mm

Key Benefits

1. Optimized for gravel speed: Lightweight carbon construction, clever aero integration (Aerocore), and race-grade geometry make the Kaius fast and agile.
2. Sleek, hidden tech: The integrated cockpit and ICS cable routing deliver clean aesthetics and aerodynamic advantage.
3. Robust and modern platform: With UDH hanger, 12 mm thru-axles, and race-compliant carbon, this is a future-ready gravel machine.
4. Reliable electronic shifting: SRAM Rival XPLR AXS provides crisp, wireless performance with 13-speed gearing.
5. Clear tire clearance: Accommodates up to 44 mm tires for confident traction across varied surfaces.

Final Take

The BMC Kaius 01 Four sets a new standard for gravel race bikes, blending Swiss-engineered lightweight performance, advanced integration, and dependable SRAM AXS shifting. Its a powerful and stylish companion for racers and gravel enthusiasts seeking speed without compromise.