2025 OPEN Cycle U.P. Base

Design
Drop Bar, Rigid, non-suspension corrected
Frame
Carbon/Composite
Fork
Carbon/Composite
Features
Disc brake
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Somewhat aggressive stack and reachvs category

Geometry

S
M
L
XL
Stack
522mm
551mm
580mm
604mm
Reach
365mm
376mm
387mm
401mm
Stack to Reach Ratio
1.43:1
1.47:1
1.5:1
1.51:1
Seat Tube Length, C-T
520mm
540mm
560mm
580mm
Top Tube Length, Effective/Horizontal HT Top
528mm
549mm
570mm
591mm
Top Tube Slope
2.9deg
3.8deg
4.7deg
5.1deg
Head Tube Angle
69.5deg
71deg
72.5deg
72.5deg
Seat Tube Angle
72.5deg
72.5deg
72.5deg
72.5deg
Head Tube Length
105mm
130mm
155mm
180mm
Bottom Bracket Drop
70mm
70mm
70mm
70mm
Bottom Bracket Height
281mm
281mm
281mm
281mm
Chainstay Length
420mm
420mm
420mm
420mm
Chainstay Length Horizontal
414.1mm
414.1mm
414.1mm
414.1mm
Front-Center
592mm
598mm
604mm
622mm
Front-Center Horizontal
587.9mm
593.9mm
599.9mm
617.9mm
Wheelbase
1002mm
1008mm
1014mm
1032mm
Fork Offset/Rake
50mm
50mm
50mm
50mm
Trail
77.9mm
high
68mm
high
58.2mm
mid/​neutral
58.2mm
mid/​neutral
Mechanical Trail
72.9mm
64.3mm
55.6mm
55.6mm
Wheel Flop
25.5mm
20.9mm
16.7mm
16.7mm
Standover Height
743mm
767mm
791mm
815mm
Tire to Pedal Spindle
71mm
170 mm cranks
77mm
170 mm cranks
83mm
170 mm cranks
101mm
170 mm cranks
Pedal Spindle to Ground Clearance
111mm
170 mm cranks
111mm
170 mm cranks
111mm
170 mm cranks
111mm
170 mm cranks

Base Build

S
M
L
XL
Wheel Size
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
40mm
40mm
40mm
40mm
Tire Width Max
46mm
46mm
46mm
46mm
Tire Outer Diameter
702mm
702mm
702mm
702mm
Bike Length with Tires
1704mm
1710mm
1716mm
1734mm

Published Sizing Recommendations

Height
5 ft 2 in
to
5 ft 8 in
5 ft 7 in
to
5 ft 11 in
5 ft 10 in
to
6 ft 3 in
6 ft 2 in
to
6 ft 7 in

Stack and Reach vs. Category Trend

Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Learn more about the Upright/Aggressive Scale
Category Trend
All-road/Gravel
Source:https://opencycle.com/new-upper