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

Insights

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

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

Somewhat upright stack and reach vs trend of sport touring bikes

Design deviates from other sizes of Seaboard CX03

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

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	45mm	40mm -5mm
Tire Outer Diameter	712mm	702mm -10mm
Bike Length with Tires	1740mm	1716mm -24mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Unknown
Fork Material	Carbon/Composite	Unknown
Brake Type	Disc	Unknown

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