2020 roll: Bicycle Company A:1R Base

Design
Drop Bar, Rigid, non-suspension corrected
Frame
Aluminum
Fork
Aluminum
Features
Disc brake
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

Geometry

Size 1
Size 2
Size 3
Stack
582.3mm
607.9mm
631.6mm
Reach
388.3mm
394.8mm
402.6mm
Stack to Reach Ratio
1.5:1
1.54:1
1.57:1
Seat Tube Length, C-TTT
430mm
485mm
540mm
Top Tube Length, Actual C-C
580mm
600mm
620mm
Head Tube Angle
70.5deg
71deg
71deg
Seat Tube Angle
72deg
71.5deg
71deg
Head Tube Length
145mm
170mm
195mm
Bottom Bracket Drop
60mm
60mm
60mm
Bottom Bracket Height
291mm
291mm
291mm
Chainstay Length
450mm
450mm
450mm
Chainstay Length Horizontal
446mm
446mm
446mm
Front-Center
623.9mm
633.9mm
649.8mm
Front-Center Horizontal
621mm
631mm
647mm
Wheelbase
1067mm
1077mm
1093mm
Fork Offset/Rake
45mm
45mm
45mm
Fork Length (On-Axis)
405mm
405mm
405mm
Trail
76.6mm
high
73.3mm
high
73.3mm
high
Mechanical Trail
72.2mm
69.3mm
69.3mm
Wheel Flop
24.1mm
22.6mm
22.6mm
Standover Height
710mm
755mm
795mm
Tire to Pedal Spindle
102.9mm
170 mm cranks
112.9mm
170 mm cranks
128.8mm
170 mm cranks
Pedal Spindle to Ground Clearance
121mm
170 mm cranks
121mm
170 mm cranks
121mm
170 mm cranks

Base Build

Size 1
Size 2
Size 3
Wheel Size
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
40mm
40mm
40mm
Tire Outer Diameter
702mm
702mm
702mm
Bike Length with Tires
1769mm
1779mm
1795mm

Published Sizing Recommendations

Height
5 ft 0 in
to
5 ft 5 in
5 ft 6 in
to
5 ft 11 in
6 ft 0 in
to
6 ft 4 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://www.rollbicycles.com/pages/bike-geometry