BMC Kaius Frameset
Best carbon frameset for cyclists building a high-performance custom road bike.
This premium frameset is engineered for the discerning cyclist seeking a bespoke build. Crafted from high-quality carbon fiber, it offers a lightweight yet robust foundation for a high-performance road bicycle. Its design prioritizes aerodynamic efficiency and responsive handling, making it ideal for competitive racing or spirited group rides. The internal cable routing contributes to a clean aesthetic and improved aerodynamics. While currently unavailable in all listed sizes, this frameset represents a top-tier choice for those aspiring to create a custom dream machine.
$4499.00
Owner Satisfaction
4.6
/ 5
Category Rank
239
/ 597
#239 in Bicycle Frames
Price vs Category Average
+189%
Above average
Material
Carbon Fiber
/ Carbon Fiber
Who it's for
- Competitive gravel racers prioritizing climbing efficiency and low weight
- Speed-focused riders seeking road-bike performance on mixed terrain
- Aesthetic-conscious cyclists valuing clean lines and aerodynamic integration
Who should skip it
- Budget-conscious buyers looking for high-value gravel options
- Home mechanics preferring simple, accessible cable routing and maintenance
- Endurance riders seeking maximum comfort on technical, rough surfaces
Performance breakdown
Aerodynamic Efficiency
Sleek tube shaping slices through headwinds with minimal drag.
Frame Stiffness
High-modulus carbon ensures efficient power transfer during aggressive sprints.
Handling Precision
Responsive geometry provides razor-sharp control through technical corners.
Build Versatility
Standardized components make custom component selection straightforward and intuitive.
Weight Optimization
Featherlight carbon layup keeps the total build weight impressively low.
Maintenance Accessibility
Internal routing looks clean but requires patience during component installation.
Key Specs
Material
Carbon Fiber
Frame Type
Road
Wheel Size Compatibility
700c
Brake Type Compatibility
Disc Brake
Suspension Type
Rigid
Derailleur Hanger Type
Replaceable
Cable Routing Type
Internal
Know before you buy
The Kaius is designed for high-performance road cycling. Its geometry and carbon construction prioritize aerodynamic efficiency and responsive handling, making it an excellent choice for competitive racing or fast-paced group rides.
Yes, the frameset is engineered specifically for disc brake compatibility. This ensures you get consistent, reliable stopping power in all weather conditions.
Internal cable routing provides a clean aesthetic and reduces aerodynamic drag. While it creates a sleek profile, it does require a bit more patience during initial assembly or when replacing housing compared to external systems.
This frameset is designed for 700c wheels. This standard size offers a great balance of rolling efficiency and stability for road cycling.
Yes, the Kaius features a replaceable derailleur hanger. This is a practical design choice that protects your frame from potential damage in the event of a crash or impact.
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$4499