Compare: 2023 BMC Switzerland Kaius 01 One 58 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	595mm	602mm +7mm
Reach	410mm	407mm -3mm
Stack to Reach Ratio	1.45:1	1.48:1
Seat Tube Length, C-T	513mm	580mm +67mm
Top Tube Length, Effective/Horizontal Center	592mm	—
Top Tube Length, Effective/Horizontal HT Top	—	597mm
Top Tube Slope	10.6deg	4.8deg -5.8deg
Head Tube Angle	72deg	72.3deg +0.3deg
Seat Tube Angle	73deg	72.5deg -0.5deg
Head Tube Length	170mm	165mm -5mm
Bottom Bracket Drop	80mm	78mm -2mm
Bottom Bracket Height	271mm	283mm +12mm
Chainstay Length	—	435mm
Chainstay Length Horizontal	420mm	428mm +8mm
Front-Center	632mm	632mm +0mm
Front-Center Horizontal	619mm	627.1mm +8.1mm
Wheelbase	1039mm	1055mm +16mm
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	798mm	—
Tire to Pedal Spindle	106mm 175 mm cranks	101mm -5mm 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	1741mm	1777mm +36mm
Crank Length	175mm	—
Stem Length	100mm	—
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