Compare: 2023 TanTan Cycling (Seraph) FM025 Base XL vs 2025 TWITTER Bikes T8 PRO 54

Insights

Somewhat aggressive stack and reach vs trend of performance road bikes

Design deviates from other sizes of TWITTER Bikes T8

Stack	560mm	562mm +2mm
Reach	397mm	402mm +5mm
Stack to Reach Ratio	1.41:1	1.4:1
Seat Tube Length, C-T	540mm	—
Seat Tube Length, Unknown	—	540mm
Seat Tube Length, Effective Center	560mm	—
Top Tube Length, Effective/Horizontal Center	572mm	—
Top Tube Length, Effective/Horizontal Unknown	174.5mm	573mm +398.5mm
Top Tube Slope	4.5deg	4.7deg +0.2deg
Head Tube Angle	73deg	73deg +0deg
Seat Tube Angle	73deg	73deg +0deg
Head Tube Length	160mm	150mm -10mm
Bottom Bracket Drop	69mm	67mm -2mm
Bottom Bracket Height	272mm	272mm +0mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	404.2mm	404.5mm +0.3mm
Front-Center	602mm	604mm +2mm
Front-Center Horizontal	603.9mm	600.3mm -3.6mm
Wheelbase	1008mm	1004.8mm -3.2mm
Fork Offset/Rake	45mm	45mm +0mm
Fork Length (Axle-To-Crown)	375mm	—
Trail	57.2mm mid/neutral	56.6mm -0.6mm mid/neutral
Mechanical Trail	54.7mm	54.1mm -0.6mm
Wheel Flop	16mm	15.8mm -0.2mm
Standover Height	810mm	—
Tire to Pedal Spindle	91mm 170 mm cranks	95mm +4mm 170 mm cranks
Pedal Spindle to Ground Clearance	102mm 170 mm cranks	102mm +0mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	30mm	28mm -2mm
Tire Width Max	32mm	—
Tire Outer Diameter	682mm	678mm -4mm
Bike Length with Tires	1690mm	1682.8mm -7.2mm
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