Compare: 2023 BMC Switzerland Kaius 01 One 47 vs 2025 incolor VOYAGER Base 51

Insights

Somewhat aggressive stack and reach vs trend of progressive gravel bikes

Design deviates from other sizes of BMC Switzerland Kaius

Somewhat aggressive stack and reach vs trend of all-road/gravel bikes

Stack	510mm	539mm +29mm
Reach	390mm	375mm -15mm
Stack to Reach Ratio	1.31:1	1.44:1
Seat Tube Length, C-T	428mm	—
Top Tube Length, Effective/Horizontal Center	546mm	—
Top Tube Length, Effective/Horizontal Unknown	—	522mm
Top Tube Slope	11.1deg	—
Head Tube Angle	71deg	71deg +0deg
Seat Tube Angle	73deg	74deg +1deg
Head Tube Length	85mm	129mm +44mm
Bottom Bracket Drop	80mm	74mm -6mm
Bottom Bracket Height	271mm	277mm +6mm
Chainstay Length	—	415mm
Chainstay Length Horizontal	420mm	408.4mm -11.6mm
Front-Center	596mm	592mm -4mm
Front-Center Horizontal	583mm	587.7mm +4.7mm
Wheelbase	1003mm	996mm -7mm
Fork Offset/Rake	50mm	49.7mm -0.3mm
Fork Length (Axle-To-Crown)	387mm	—
Fork Length, Unknown	—	380mm
Trail	68mm high	68.3mm +0.3mm high
Mechanical Trail	64.3mm	64.6mm +0.3mm
Wheel Flop	20.9mm	21mm +0.1mm
Standover Height	684mm	762mm +78mm
Tire to Pedal Spindle	75mm 170 mm cranks	71mm -4mm 170 mm cranks
Pedal Spindle to Ground Clearance	101mm 170 mm cranks	107mm +6mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	40mm	40mm +0mm
Tire Width Max	44mm	45mm +1mm
Tire Outer Diameter	702mm	702mm +0mm
Bike Length with Tires	1705mm	1698mm -7mm
Crank Length	170mm	—
Stem Length	80mm	—
Stem Angle	-12.5deg	—
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc