Compare: 2023 BMC Switzerland Kaius 01 One 61 vs 2024 TanTan Cycling (Seraph) GR201 Base 580

Insights

Somewhat upright stack and reach vs trend of progressive gravel bikes

Design deviates from other sizes of TanTan Cycling (Seraph) GR201

Bar type unusual for category

This: Aero Bar
Category: Drop Bar

Stack	620mm	602mm -18mm
Reach	414mm	407mm -7mm
Stack to Reach Ratio	1.5:1	1.48:1
Seat Tube Length, C-T	533mm	580mm +47mm
Top Tube Length, Effective/Horizontal Center	604mm	—
Top Tube Length, Effective/Horizontal HT Top	—	597mm
Top Tube Slope	11deg	4.8deg -6.2deg
Head Tube Angle	72deg	72.3deg +0.3deg
Seat Tube Angle	73deg	72.5deg -0.5deg
Head Tube Length	196mm	165mm -31mm
Bottom Bracket Drop	80mm	78mm -2mm
Bottom Bracket Height	271mm	283mm +12mm
Chainstay Length	—	435mm
Chainstay Length Horizontal	420mm	428mm +8mm
Front-Center	644mm	632mm -12mm
Front-Center Horizontal	631mm	627.1mm -3.9mm
Wheelbase	1051mm	1055mm +4mm
Fork Offset/Rake	45mm	50mm +5mm
Fork Length (On-Axis)	—	400mm
Fork Length (Axle-To-Crown)	387mm	—
Trail	66.7mm high	62.7mm -4mm mid/neutral
Mechanical Trail	63.5mm	59.8mm -3.7mm
Wheel Flop	19.6mm	18.2mm -1.4mm
Standover Height	818mm	—
Tire to Pedal Spindle	118mm 175 mm cranks	101mm -17mm 170 mm cranks
Pedal Spindle to Ground Clearance	96mm 175 mm cranks	113mm +17mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	40mm	50mm +10mm
Tire Width Max	44mm	—
Tire Outer Diameter	702mm	722mm +20mm
Bike Length with Tires	1753mm	1777mm +24mm
Crank Length	175mm	—
Stem Length	110mm	—
Stem Angle	-12.5deg	—
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Aero Bar
Frame Material	Carbon/Composite	Unknown
Fork Material	Carbon/Composite	Unknown
Brake Type	Disc	Unknown