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

Insights

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

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

Very upright stack and reach vs trend of progressive gravel bikes

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

Stack	582mm	600mm +18mm
Reach	382mm	390mm +8mm
Stack to Reach Ratio	1.52:1	1.54:1
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	150mm	177mm +27mm
Bottom Bracket Drop	76mm	67mm -9mm
Bottom Bracket Height	273mm	294mm +21mm
Chainstay Length	430mm	435mm +5mm
Chainstay Length Horizontal	423.2mm	429.8mm +6.6mm
Front-Center	614mm	635.7mm +21.7mm
Front-Center Horizontal	609.3mm	632.2mm +22.9mm
Wheelbase	1032.5mm	1062mm +29.5mm
Fork Offset/Rake	50mm	55mm +5mm
Fork Length, Unknown	—	405mm
Trail	67.3mm high	66.1mm -1.2mm high
Mechanical Trail	63.6mm	62.5mm -1.1mm
Wheel Flop	20.7mm	20.4mm -0.3mm
Tire to Pedal Spindle	95mm 170 mm cranks	104.7mm +9.7mm 170 mm cranks
Pedal Spindle to Ground Clearance	103mm 170 mm cranks	124mm +21mm 170 mm cranks

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