Compare: 2025 Avenger FREEDOM Base XL 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 Avenger FREEDOM

Very upright stack and reach vs trend of progressive gravel bikes

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

Stack	601.6mm	600mm -1.6mm
Reach	391.8mm	390mm -1.8mm
Stack to Reach Ratio	1.54:1	1.54:1
Seat Tube Length, C-TTT	—	566mm
Seat Tube Length, Unknown	590mm	—
Top Tube Length, Effective/Horizontal Center	—	575mm
Top Tube Length, Effective/Horizontal Unknown	570mm	—
Top Tube Slope	3.7deg	4.1deg +0.4deg
Head Tube Angle	71deg	71deg +0deg
Seat Tube Angle	73.5deg	72.9deg -0.6deg
Head Tube Length	182mm	177mm -5mm
Bottom Bracket Drop	68mm	67mm -1mm
Bottom Bracket Height	283mm	294mm +11mm
Chainstay Length	430mm	435mm +5mm
Chainstay Length Horizontal	424.6mm	429.8mm +5.2mm
Front-Center	632.2mm	635.7mm +3.5mm
Front-Center Horizontal	628.5mm	632.2mm +3.7mm
Wheelbase	1053.1mm	1062mm +8.9mm
Fork Offset/Rake	45mm	55mm +10mm
Fork Length (On-Axis)	400mm	—
Fork Length, Unknown	—	405mm
Trail	73.3mm high	66.1mm -7.2mm high
Mechanical Trail	69.3mm	62.5mm -6.8mm
Wheel Flop	22.6mm	20.4mm -2.2mm
Tire to Pedal Spindle	111.2mm 170 mm cranks	104.7mm -6.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	113mm 170 mm cranks	124mm +11mm 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	1755.1mm	1784mm +28.9mm
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