Compare: 2023 BMC Switzerland Kaius 01 One 54 vs 2022 TanTan Cycling (Seraph) GR047 Base M

Insights

Average stack and reach vs trend of progressive gravel bikes

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

Design deviates from other sizes of TanTan Cycling (Seraph) GR047

Stack	550mm	582mm +32mm
Reach	401mm	382mm -19mm
Stack to Reach Ratio	1.37:1	1.52:1
Seat Tube Length, C-T	468mm	460mm -8mm
Top Tube Length, Effective/Horizontal Center	569mm	—
Top Tube Length, Effective/Horizontal HT Top	—	552mm
Top Tube Slope	10.8deg	—
Head Tube Angle	72deg	71deg -1deg
Seat Tube Angle	73deg	—
Effective Seat Tube Angle, ETT Center	—	73.1deg
Head Tube Length	123mm	150mm +27mm
Bottom Bracket Drop	80mm	76mm -4mm
Bottom Bracket Height	271mm	273mm +2mm
Chainstay Length	—	430mm
Chainstay Length Horizontal	420mm	423.2mm +3.2mm
Front-Center	608mm	614mm +6mm
Front-Center Horizontal	595mm	609.3mm +14.3mm
Wheelbase	1015mm	1032.5mm +17.5mm
Fork Offset/Rake	45mm	50mm +5mm
Fork Length (Axle-To-Crown)	387mm	—
Trail	66.7mm high	67.3mm +0.6mm high
Mechanical Trail	63.5mm	63.6mm +0.1mm
Wheel Flop	19.6mm	20.7mm +1.1mm
Standover Height	756mm	—
Tire to Pedal Spindle	84.5mm 172.5 mm cranks	95mm +10.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	98.5mm 172.5 mm cranks	103mm +4.5mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	40mm	38mm -2mm
Tire Width Max	44mm	—
Tire Outer Diameter	702mm	698mm -4mm
Bike Length with Tires	1717mm	1730.5mm +13.5mm
Crank Length	172.5mm	—
Stem Length	90mm	—
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