Compare: 2020 Flyxii FE-02 Gravel Base 46 vs 2026 TanTan Cycling (Seraph) GR257 Base 480

Insights

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

Design deviates from other sizes of Flyxii FE-02 Gravel

Somewhat upright stack and reach vs trend of progressive gravel bikes

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

Stack	528mm	520mm -8mm
Reach	364mm	363mm -1mm
Stack to Reach Ratio	1.45:1	1.43:1
Seat Tube Length, C-T	460mm	—
Seat Tube Length, C-TTT	—	449mm
Top Tube Length, Effective/Horizontal Center	—	510mm
Top Tube Length, Effective/Horizontal Unknown	510mm	—
Top Tube Slope	9.9deg	8deg -1.9deg
Head Tube Angle	70.5deg	70deg -0.5deg
Seat Tube Angle	74.5deg	74.3deg -0.2deg
Head Tube Length	110mm	86mm -24mm
Bottom Bracket Drop	69mm	77mm +8mm
Bottom Bracket Height	282mm	284mm +2mm
Chainstay Length	435mm	435mm +0mm
Chainstay Length Horizontal	429.5mm	428.1mm -1.4mm
Front-Center	583.7mm	587.9mm +4.2mm
Front-Center Horizontal	579.6mm	582.9mm +3.3mm
Wheelbase	1009.1mm	1011mm +1.9mm
Fork Offset/Rake	50mm	55mm +5mm
Fork Length, Unknown	395mm	405mm +10mm
Trail	71.3mm high	72.9mm +1.6mm high
Mechanical Trail	67.2mm	68.5mm +1.3mm
Wheel Flop	22.4mm	23.4mm +1mm
Tire to Pedal Spindle	67.7mm 165 mm cranks	56.9mm -10.8mm 170 mm cranks
Pedal Spindle to Ground Clearance	117mm 165 mm cranks	114mm -3mm 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	—	57mm
Tire Outer Diameter	702mm	722mm +20mm
Bike Length with Tires	1711.1mm	1733mm +21.9mm
Crank Length	165mm	—
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