Compare: 2023 TanTan Cycling (Seraph) TT-X68 Base 56 vs 2025 Trek Bikes Madone SL6 Gen 8 L

Insights

Somewhat aggressive stack and reach vs trend of endurance road bikes

Design deviates from other sizes of TanTan Cycling (Seraph) TT-X68

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Trek Bikes Madone

Stack	565mm	582mm +17mm
Reach	395mm	394mm -1mm
Stack to Reach Ratio	1.43:1	1.48:1
Seat Tube Length, Unknown	494mm	—
Seat Tube Length, Effective Unknown	—	548mm
Top Tube Length, Effective/Horizontal Center	562mm	—
Top Tube Length, Effective/Horizontal Unknown	—	568mm
Top Tube Slope	9.7deg	5.9deg -3.8deg
Head Tube Angle	73.5deg	73.8deg +0.3deg
Seat Tube Angle	73.5deg	73.4deg -0.1deg
Head Tube Length	157mm	172mm +15mm
Bottom Bracket Drop	72mm	68mm -4mm
Bottom Bracket Height	271mm	271mm +0mm
Chainstay Length	410mm	411mm +1mm
Chainstay Length Horizontal	403.6mm	405.3mm +1.7mm
Front-Center	592mm	271mm -321mm
Front-Center Horizontal	587.4mm	584.7mm -2.7mm
Wheelbase	991mm	990mm -1mm
Fork Offset/Rake	44mm	40mm -4mm
Fork Length (Axle-To-Crown)	370mm	—
Trail	55.7mm mid/neutral	56.8mm +1.1mm mid/neutral
Mechanical Trail	53.4mm	54.6mm +1.2mm
Wheel Flop	15.2mm	15.2mm +0mm
Standover Height	785mm	820mm +35mm
Tire to Pedal Spindle	76.5mm 172.5 mm cranks	-240.5mm -317mm 172.5 mm cranks
Pedal Spindle to Ground Clearance	98.5mm 172.5 mm cranks	98.5mm +0mm 172.5 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	32mm	28mm -4mm
Tire Width Max	32mm	32mm +0mm
Tire Outer Diameter	686mm	678mm -8mm
Bike Length with Tires	1677mm	1668mm -9mm
Crank Length	172.5mm	172.5mm +0mm
Stem Length	—	100mm
Stem Angle	—	-7deg
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