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

Insights

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

Average stack and reach vs trend of performance road bikes

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

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

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