BMC Kaius 2023 geometry

2027
2026
2025
2024
2023

Size chart for fitting. If this bike already feels right, find others with a similar riding position (size 47). Category: gravel.

Size	Stack	Reach	Head tube angle	Seat tube angle	Chainstay	Wheelbase	BB drop
47	529 mm	375 mm	70.5°	74.0°	425 mm	1009 mm	76 mm
51	549 mm	383 mm	71.0°	73.7°	425 mm	1019 mm	76 mm
54	567 mm	390 mm	71.5°	73.5°	425 mm	1029 mm	74 mm
56	585 mm	397 mm	71.5°	73.2°	425 mm	1039 mm	74 mm
58	605 mm	404 mm	72.0°	73.0°	425 mm	1051 mm	72 mm
61	625 mm	411 mm	72.0°	73.0°	425 mm	1063 mm	72 mm

Similar bikes

Closest matches to this riding position — free, no login.

Trek Boone 2023Size 49 · 529 mm / 375 mm
Specialized Crux 2023Size 49 · 529 mm / 375 mm
Specialized S-Works Crux 2023Size 49 · 529 mm / 375 mm
Trek Boone 2024Size 49 · 530 mm / 375 mm
Specialized Crux 2024Size 49 · 530 mm / 375 mm
BMC Kaius 2024Size 47 · 530 mm / 375 mm
Specialized S-Works Crux 2024Size 49 · 530 mm / 375 mm
Trek Boone 2022Size 49 · 529 mm / 374 mm

Size guidance

Stack and reach describe the frame's cockpit envelope better than traditional seat-tube sizing. If you know your preferred stack/reach from a bike that already fits, search within a few millimeters first, then check head angle and chainstay for handling feel. See the glossary for stack, reach, and HTA.