Compare: 2022 TanTan Cycling (Seraph) FM639 Base 50 vs 2025 Cervelo Cycles Soloist Frameset 51

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of TanTan Cycling (Seraph) FM639

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Cervelo Cycles Soloist

Stack	509mm	515mm +6mm
Reach	370mm	374mm +4mm
Stack to Reach Ratio	1.38:1	1.38:1
Seat Tube Length, C-T	—	483mm
Top Tube Length, Effective/Horizontal Center	—	532mm
Top Tube Length, Effective/Horizontal Unknown	526mm	—
Top Tube Slope	—	5.9deg
Head Tube Angle	71deg	72deg +1deg
Seat Tube Angle	73deg	73deg +0deg
Head Tube Length	105mm	106mm +1mm
Bottom Bracket Drop	72mm	74.5mm +2.5mm
Bottom Bracket Height	267mm	264.5mm -2.5mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Max	—	410mm
Chainstay Length Horizontal	403.6mm	403.2mm -0.4mm
Chainstay Length Horizontal Max	—	403.2mm
Front-Center	573mm	576mm +3mm
Front-Center Horizontal	568.4mm	571.2mm +2.8mm
Wheelbase	972mm	974.3mm +2.3mm
Wheelbase Max	—	974mm
Fork Offset/Rake	45mm	51.5mm +6.5mm
Trail	69.1mm high	56mm -13.1mm mid/neutral
Mechanical Trail	65.4mm	53.3mm -12.1mm
Wheel Flop	21.3mm	16.5mm -4.8mm
Standover Height	715mm	748mm +33mm
Tire to Pedal Spindle	64mm 170 mm cranks	67mm +3mm 170 mm cranks
Pedal Spindle to Ground Clearance	97mm 170 mm cranks	94.5mm -2.5mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	28mm +0mm
Tire Width Max	28mm	—
Tire Outer Diameter	678mm	678mm +0mm
Bike Length with Tires	1650mm	1652.3mm +2.3mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Unknown	Carbon/Composite
Fork Material	Unknown	Carbon/Composite
Brake Type	Unknown	Disc