Compare: 2025 Seaboard CX03 Base XL (56) vs 2026 OPEN Cycle U.P. 2.0 L

Insights

Somewhat aggressive 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	602mm	595mm -7mm
Reach	409mm	392mm -17mm
Stack to Reach Ratio	1.47:1	1.52:1
Seat Tube Length, C-T	560mm	504mm -56mm
Top Tube Length, Effective/Horizontal Center	564mm	—
Top Tube Length, Effective/Horizontal HT Top	—	564mm
Top Tube Slope	6.2deg	11.8deg +5.6deg
Head Tube Angle	73.5deg	72.5deg -1deg
Seat Tube Angle	75.5deg	73.5deg -2deg
Head Tube Length	200mm	—
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	610.4mm	614mm +3.6mm
Front-Center Horizontal	606.1mm	609.3mm +3.2mm
Wheelbase	1025mm	1028mm +3mm
Fork Offset/Rake	38.5mm	50mm +11.5mm
Trail	63.8mm mid/neutral	59.8mm -4mm mid/neutral
Mechanical Trail	61.2mm	57.1mm -4.1mm
Wheel Flop	17.4mm	17.2mm -0.2mm
Standover Height	—	799mm
Tire to Pedal Spindle	89.4mm 170 mm cranks	88mm -1.4mm 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	1727mm	1740mm +13mm
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	XL (56)	L
Category	Sport Touring	All-road/Gravel