Compare: 2025 Seaboard CX03 Base L (53) vs 2026 OPEN Cycle U.P. 2.0 L

Insights

Somewhat upright stack and reach vs trend of sport touring bikes

Design deviates from other sizes of Seaboard CX03

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

Design deviates from other sizes of OPEN Cycle U.P.

Stack	589mm	595mm +6mm
Reach	380mm	392mm +12mm
Stack to Reach Ratio	1.55:1	1.52:1
Seat Tube Length, C-T	530mm	504mm -26mm
Top Tube Length, Effective/Horizontal Center	549mm	—
Top Tube Length, Effective/Horizontal HT Top	—	564mm
Top Tube Slope	8.6deg	11.8deg +3.2deg
Head Tube Angle	72deg	72.5deg +0.5deg
Seat Tube Angle	74deg	73.5deg -0.5deg
Head Tube Length	170mm	—
Bottom Bracket Drop	72mm	73mm +1mm
Bottom Bracket Height	279mm	283mm +4mm
Chainstay Length	425mm	425mm +0mm
Chainstay Length Horizontal	418.9mm	418.7mm -0.2mm
Front-Center	599.5mm	614mm +14.5mm
Front-Center Horizontal	595.1mm	609.3mm +14.2mm
Wheelbase	1014mm	1028mm +14mm
Fork Offset/Rake	44.9mm	50mm +5.1mm
Trail	66.9mm high	59.8mm -7.1mm mid/neutral
Mechanical Trail	63.6mm	57.1mm -6.5mm
Wheel Flop	19.7mm	17.2mm -2.5mm
Standover Height	—	799mm
Tire to Pedal Spindle	78.5mm 170 mm cranks	88mm +9.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	109mm 170 mm cranks	113mm +4mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	40mm	45mm +5mm
Tire Outer Diameter	702mm	712mm +10mm
Bike Length with Tires	1716mm	1740mm +24mm
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

Actions	Collection I've Ridden	Collection I've Ridden
Source	https://tsunamibicycle.com/product/thru-axle-steel-gravel-bike-frameset-cx03-700c-travel-bike-touring-bike-frameset/	https://opencycle.com/upper-20
Brand	Seaboard	OPEN Cycle
Bike	2025 CX03 Base	2026 U.P. 2.0
Size	L (53)	L
Category	Sport Touring	All-road/Gravel