Compare: 2026 Argon 18 Sum Pro M vs 2025 SPCYCLE SP-R088 Base 56

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Argon 18 Sum

Somewhat aggressive stack and reach vs trend of endurance road bikes

Design deviates from other sizes of SPCYCLE SP-R088

Stack	564mm	565mm +1mm
Reach	390mm	395mm +5mm
Stack to Reach Ratio	1.45:1	1.43:1
Seat Tube Length, C-T	—	495mm
Seat Tube Length, Unknown	505mm	—
Top Tube Length, Effective/Horizontal HT Top	—	562mm
Top Tube Length, Effective/Horizontal Unknown	557mm	—
Top Tube Slope	8.5deg	9.6deg +1.1deg
Head Tube Angle	72.7deg	73.5deg +0.8deg
Seat Tube Angle	73.5deg	73.5deg +0deg
Head Tube Length	151mm	—
Bottom Bracket Drop	77mm	74mm -3mm
Bottom Bracket Height	259mm	269mm +10mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	402.7mm	403.3mm +0.6mm
Front-Center	592.3mm	595mm +2.7mm
Front-Center Horizontal	587.3mm	589.7mm +2.4mm
Wheelbase	990mm	993mm +3mm
Fork Offset/Rake	44mm	47.3mm +3.3mm
Fork Length, Unknown	374mm	—
Trail	58.6mm mid/neutral	52.3mm -6.3mm mid/neutral
Mechanical Trail	55.9mm	50.2mm -5.7mm
Wheel Flop	16.6mm	14.2mm -2.4mm
Tire to Pedal Spindle	83.8mm 172.5 mm cranks	82mm -1.8mm 170 mm cranks
Pedal Spindle to Ground Clearance	86.5mm 172.5 mm cranks	99mm +12.5mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	25mm	32mm +7mm
Tire Width Max	32mm	—
Tire Outer Diameter	672mm	686mm +14mm
Bike Length with Tires	1662mm	1679mm +17mm
Crank Length	172.5mm	—
Handlebar Width	44cm	—
Stem Length	100mm	—
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