Compare: 2025 TWITTER Bikes T8 PRO 54 vs 2025 TanTan Cycling (Seraph) TT-X65 Base 54

Insights

Somewhat aggressive stack and reach vs trend of performance road bikes

Design deviates from other sizes of TWITTER Bikes T8

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of TanTan Cycling (Seraph) TT-X65

Stack	562mm	561mm -1mm
Reach	402mm	395mm -7mm
Stack to Reach Ratio	1.4:1	1.42:1
Seat Tube Length, C-T	—	540mm
Seat Tube Length, Unknown	540mm	—
Top Tube Length, Effective/Horizontal Unknown	573mm	558mm -15mm
Top Tube Slope	4.7deg	4.5deg -0.2deg
Head Tube Angle	73deg	72.5deg -0.5deg
Seat Tube Angle	73deg	73.8deg +0.8deg
Head Tube Length	150mm	155mm +5mm
Bottom Bracket Drop	67mm	72.9mm +5.9mm
Bottom Bracket Height	272mm	270.1mm -1.9mm
Chainstay Length	410mm	408mm -2mm
Chainstay Length Horizontal	404.5mm	401.4mm -3.1mm
Front-Center	604mm	601mm -3mm
Front-Center Horizontal	600.3mm	596.6mm -3.7mm
Wheelbase	1004.8mm	998mm -6.8mm
Fork Offset/Rake	45mm	45mm +0mm
Trail	56.6mm mid/neutral	61mm +4.4mm mid/neutral
Mechanical Trail	54.1mm	58.1mm +4mm
Wheel Flop	15.8mm	17.5mm +1.7mm
Standover Height	—	810mm
Tire to Pedal Spindle	95mm 170 mm cranks	88mm -7mm 170 mm cranks
Pedal Spindle to Ground Clearance	102mm 170 mm cranks	100.1mm -1.9mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	32mm +4mm
Tire Width Max	—	32mm
Tire Outer Diameter	678mm	686mm +8mm
Bike Length with Tires	1682.8mm	1684mm +1.2mm
Crank Length	—	170mm
Handlebar Width	—	38mm
Stem Length	—	100mm
Stem Angle	—	-6deg
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