Compare: 2026 OPEN Cycle U.P. 2.0 XL vs 2023 Seaboard GR02 Base 59

Insights

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

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

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

Design deviates from other sizes of Seaboard GR02

Stack	620mm	611.8mm -8.2mm
Reach	404mm	404.5mm +0.5mm
Stack to Reach Ratio	1.53:1	1.51:1
Seat Tube Length, C-T	518mm	—
Seat Tube Length, Unknown	—	590mm
Top Tube Length, Effective/Horizontal HT Top	584mm	—
Top Tube Length, Effective/Horizontal Unknown	—	580mm
Top Tube Slope	12.6deg	4.5deg -8.1deg
Head Tube Angle	72.5deg	72deg -0.5deg
Seat Tube Angle	73.5deg	74deg +0.5deg
Head Tube Length	—	19mm
Bottom Bracket Drop	72mm	70mm -2mm
Bottom Bracket Height	284mm	278mm -6mm
Chainstay Length	425mm	425mm +0mm
Chainstay Length Horizontal	418.9mm	419.2mm +0.3mm
Front-Center	634mm	637.1mm +3.1mm
Front-Center Horizontal	630.1mm	633.2mm +3.1mm
Wheelbase	1049mm	1052.4mm +3.4mm
Fork Offset/Rake	50mm	50.1mm +0.1mm
Trail	59.8mm mid/neutral	60.4mm +0.6mm mid/neutral
Mechanical Trail	57.1mm	57.5mm +0.4mm
Wheel Flop	17.2mm	17.8mm +0.6mm
Standover Height	815mm	—
Tire to Pedal Spindle	108mm 170 mm cranks	119.1mm +11.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	114mm 170 mm cranks	108mm -6mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	45mm	37mm -8mm
Tire Outer Diameter	712mm	696mm -16mm
Bike Length with Tires	1761mm	1748.4mm -12.6mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Aluminum
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc

Actions	Collection I've Ridden	Collection I've Ridden
Source	https://opencycle.com/upper-20	https://tsunamibicycle.com/product/seaboard-gr02-2022-gravel-bike-off-road-bike-touring-bike/
Brand	OPEN Cycle	Seaboard
Bike	2026 U.P. 2.0	2023 GR02 Base
Size	XL	59
Category	All-road/Gravel	All-road/Gravel