Compare: 2026 TanTan Cycling (Seraph) GR257 Base 580 vs 2022 TanTan Cycling (Seraph) GR047 Base M

Insights

Very upright stack and reach vs trend of progressive gravel bikes

Design deviates from other sizes of TanTan Cycling (Seraph) GR257

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

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

Stack	600mm	582mm -18mm
Reach	390mm	382mm -8mm
Stack to Reach Ratio	1.54:1	1.52:1
Seat Tube Length, C-T	—	460mm
Seat Tube Length, C-TTT	566mm	—
Top Tube Length, Effective/Horizontal Center	575mm	—
Top Tube Length, Effective/Horizontal HT Top	—	552mm
Top Tube Slope	4.1deg	—
Head Tube Angle	71deg	71deg +0deg
Seat Tube Angle	72.9deg	—
Effective Seat Tube Angle, ETT Center	—	73.1deg
Head Tube Length	177mm	150mm -27mm
Bottom Bracket Drop	67mm	76mm +9mm
Bottom Bracket Height	294mm	273mm -21mm
Chainstay Length	435mm	430mm -5mm
Chainstay Length Horizontal	429.8mm	423.2mm -6.6mm
Front-Center	635.7mm	614mm -21.7mm
Front-Center Horizontal	632.2mm	609.3mm -22.9mm
Wheelbase	1062mm	1032.5mm -29.5mm
Fork Offset/Rake	55mm	50mm -5mm
Fork Length, Unknown	405mm	—
Trail	66.1mm high	67.3mm +1.2mm high
Mechanical Trail	62.5mm	63.6mm +1.1mm
Wheel Flop	20.4mm	20.7mm +0.3mm
Tire to Pedal Spindle	104.7mm 170 mm cranks	95mm -9.7mm 170 mm cranks
Pedal Spindle to Ground Clearance	124mm 170 mm cranks	103mm -21mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	50mm	38mm -12mm
Tire Width Max	57mm	—
Tire Outer Diameter	722mm	698mm -24mm
Bike Length with Tires	1784mm	1730.5mm -53.5mm
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