Compare: 2024 TanTan Cycling (Seraph) TT-R18 Base S vs 2025 Cannondale SuperX Base 51

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of TanTan Cycling (Seraph) TT-R18

Average stack and reach vs trend of all-road/gravel bikes

Design deviates from other sizes of Cannondale SuperX

Bar type unusual for category

This: Moto/Klunker/Riser Bar
Category: Drop Bar

Stack	522mm	535mm +13mm
Reach	375mm	371mm -4mm
Stack to Reach Ratio	1.39:1	1.44:1
Seat Tube Length, C-T	460mm	488mm +28mm
Top Tube Length, Effective/Horizontal Center	—	521mm
Top Tube Length, Effective/Horizontal HT Top	520mm	—
Top Tube Slope	9deg	7.4deg -1.6deg
Head Tube Angle	71deg	71deg +0deg
Seat Tube Angle	74.5deg	74.3deg -0.2deg
Head Tube Length	120mm	108mm -12mm
Bottom Bracket Drop	70mm	72mm +2mm
Bottom Bracket Height	269mm	279mm +10mm
Chainstay Length	406mm	422mm +16mm
Chainstay Length Horizontal	399.9mm	415.8mm +15.9mm
Front-Center	583mm	593mm +10mm
Front-Center Horizontal	578.1mm	589.2mm +11.1mm
Wheelbase	978mm	1005mm +27mm
Fork Offset/Rake	45mm	55mm +10mm
Fork Length (Axle-To-Crown)	373mm	400mm +27mm
Trail	69.1mm high	62.7mm -6.4mm mid/neutral
Mechanical Trail	65.4mm	59.3mm -6.1mm
Wheel Flop	21.3mm	19.3mm -2mm
Standover Height	734mm	782mm +48mm
Tire to Pedal Spindle	74mm 170 mm cranks	72mm -2mm 170 mm cranks
Pedal Spindle to Ground Clearance	99mm 170 mm cranks	109mm +10mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	40mm +12mm
Tire Width Max	32mm	—
Tire Outer Diameter	678mm	702mm +24mm
Bike Length with Tires	1656mm	1707mm +51mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Moto/Klunker/Riser Bar
Frame Material	Carbon/Composite	Unknown
Fork Material	Carbon/Composite	Unknown
Brake Type	Disc	Unknown