Compare: 2026 TanTan Cycling (Seraph) GR257 Base 610 vs 2022 TanTan Cycling (Seraph) GR047 Base XL

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	620mm	633mm +13mm
Reach	396mm	401mm +5mm
Stack to Reach Ratio	1.57:1	1.58:1
Seat Tube Length, C-T	—	530mm
Seat Tube Length, C-TTT	589mm	—
Top Tube Length, Effective/Horizontal Center	594mm	—
Top Tube Length, Effective/Horizontal HT Top	—	600mm
Top Tube Slope	3.9deg	12.8deg +8.9deg
Head Tube Angle	71deg	72deg +1deg
Seat Tube Angle	72.3deg	72.6deg +0.3deg
Head Tube Length	198mm	200mm +2mm
Bottom Bracket Drop	67mm	76mm +9mm
Bottom Bracket Height	294mm	280mm -14mm
Chainstay Length	435mm	430mm -5mm
Chainstay Length Horizontal	429.8mm	423.2mm -6.6mm
Front-Center	648.7mm	639mm -9.7mm
Front-Center Horizontal	645.2mm	634.5mm -10.7mm
Wheelbase	1075mm	1057.7mm -17.3mm
Fork Offset/Rake	55mm	50mm -5mm
Fork Length, Unknown	405mm	—
Trail	66.1mm high	63.1mm -3mm mid/neutral
Mechanical Trail	62.5mm	60mm -2.5mm
Wheel Flop	20.4mm	18.5mm -1.9mm
Tire to Pedal Spindle	117.7mm 170 mm cranks	110.5mm -7.2mm 172.5 mm cranks
Pedal Spindle to Ground Clearance	124mm 170 mm cranks	107.5mm -16.5mm 172.5 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	50mm	45mm -5mm
Tire Width Max	57mm	47mm -10mm
Tire Outer Diameter	722mm	712mm -10mm
Bike Length with Tires	1797mm	1769.7mm -27.3mm
Crank Length	—	172.5mm
Handlebar Width	—	440mm
Stem Length	—	110mm
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