BMC Kaius 01 FOUR
Product Details
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)
| Specification | Detail |
|---|---|
| Frame | Kaius 01 Premium Carbon with Aerocore Design, ICS Technology Stealth Cable Routing, UDH dropout, TCC Race compliance, Flat Mount Disc, 12x142mm thru-axle |
| Fork | Kaius 01 Premium Carbon, ICS Technology Stealth Cable Routing, TCC Race compliance, Flat Mount Disc, 12x100mm thru-axle |
| Stem | BMC RSM 01, Integrated Cockpit System (ICS) |
| Handlebar | BMC HB D4 03, Alloy 6061, Endurance geometry, 125mm drop, 70mm reach, 12° flare |
| Seatpost | Kaius 01 Premium Carbon D-shaped seatpost, 15mm offset, D-Fender compatible |
| Saddle | Fizik Vento Argo X5, 140mm |
| Crankset | SRAM Rival XPLR AXS Wide (FC-RIV-1W-E1) |
| Chainring | 42T |
| Bottom Bracket | SRAM PressFit DUB |
| Rear Derailleur | SRAM Rival XPLR AXS (RD-RIV-1E-E1) |
| Shifters | SRAM Rival AXS (ED-RIV-E1) |
| Cassette | SRAM Rival XPLR, 10–46T |
| Chain | SRAM Rival (CN-RIV-E1) |
| Gearing | 1x13 |
| Brakes | SRAM Rival AXS Hydraulic Disc |
| Rotors | SRAM Paceline, Centerlock, 160mm front / 160mm rear |
| Wheelset | CG 40 Carbon, Tubeless Ready, 40mm depth |
| Hubs | CG 40 (Front / Rear) |
| Tires | Pirelli Cinturato Gravel H, 40mm |
| Tubeless Setup | Tubeless-ready rims and tires |
| Included Accessories | Aerocore Design Carbon Bottle Cages |
| Tire Clearance | Up to 44mm measured tire |
| Weight (without pedals) | 8.3kg (Size 54 as pictured, with accessories) |
| System Weight Limit | 120kg |
| Measurement | 47 | 51 | 54 | 56 | 58 | 61 |
|---|---|---|---|---|---|---|
| Rider Height (cm) | <166 | 166–174 | 172–180 | 178–186 | 184–192 | >190 |
| Reach (mm) | 390 | 397 | 401 | 405 | 410 | 414 |
| Stack (mm) | 510 | 530 | 550 | 570 | 595 | 620 |
| Bar Drop (mm) | 125 | 125 | 125 | 125 | 125 | 125 |
| Bar Reach (mm) | 70 | 70 | 70 | 70 | 70 | 70 |
| Bar Width (mm) | 390 / 448 | 390 / 448 | 390 / 448 | 410 / 468 | 410 / 468 | 430 / 488 |
| BB Drop (mm) | 80 | 80 | 80 | 80 | 80 | 80 |
| Crank Length (mm) | 170 | 170 | 172.5 | 172.5 | 175 | 175 |
| Fork Length (mm) | 387 | 387 | 387 | 387 | 387 | 387 |
| Fork Rake (mm) | 50 | 50 | 45 | 45 | 45 | 45 |
| Front Center (mm) | 596 | 610 | 608 | 619 | 632 | 644 |
| Head Tube Length (mm) | 85 | 106 | 123 | 144 | 170 | 196 |
| Head Tube Angle (°) | 71 | 71 | 72 | 72 | 72 | 72 |
| Rear Center (mm) | 420 | 420 | 420 | 420 | 420 | 420 |
| Seat Tube Angle (°) | 73 | 73 | 73 | 73 | 73 | 73 |
| Seat Tube Length (mm) | 428 | 452 | 468 | 493 | 513 | 533 |
| Seatpost Length (mm) | 280 | 320 | 360 | 360 | 400 | 400 |
| Seatpost Offset (mm) | 15 | 15 | 15 | 15 | 15 | 15 |
| Standover Height (mm) | 684 | 722 | 756 | 780 | 798 | 818 |
| Stem Angle (°) | -8 | -8 | -8 | -8 | -8 | -8 |
| Stem Length (mm) | 80 | 90 | 90 | 100 | 100 | 110 |
| Top Tube Length (mm) | 546 | 559 | 569 | 579 | 592 | 604 |
| Trail (mm) | 68 | 68 | 68 | 68 | 68 | 68 |
| Wheelbase (mm) | 1003 | 1017 | 1015 | 1026 | 1039 | 1051 |