2023 POSST Oban Base

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

Geometry

50
52
54
56
58
Stack
525mm
537mm
555mm
575mm
595mm
Reach
376mm
383mm
390mm
390mm
404mm
Stack to Reach Ratio
1.4:1
1.4:1
1.42:1
1.47:1
1.47:1
Seat Tube Length, C-T
460mm
490mm
520mm
540mm
560mm
Top Tube Length, Effective/Horizontal HT Top
512mm
527mm
544mm
560mm
580mm
Top Tube Slope
9.2deg
7.1deg
5.8deg
6deg
5.9deg
Head Tube Angle
71.5deg
72deg
73deg
73deg
73.5deg
Seat Tube Angle
75.5deg
75deg
74.5deg
73.5deg
73.5deg
Head Tube Length
110mm
123mm
138mm
161mm
180mm
Bottom Bracket Drop
72mm
70mm
70mm
68mm
68mm
Bottom Bracket Height
267mm
269mm
269mm
271mm
271mm
Chainstay Length
410mm
410mm
410mm
412mm
412mm
Chainstay Length Horizontal
403.6mm
404mm
404mm
406.4mm
406.4mm
Front-Center
577mm
584mm
587mm
594mm
609mm
Front-Center Horizontal
573.4mm
580mm
583mm
589.7mm
604.7mm
Wheelbase
977mm
984mm
987mm
996mm
1011mm
Fork Offset/Rake
43mm
43mm
43mm
43mm
43mm
Fork Length, Unknown
370mm
370mm
370mm
370mm
370mm
Trail
68.1mm
high
64.9mm
mid/​neutral
58.7mm
mid/​neutral
58.7mm
mid/​neutral
55.6mm
mid/​neutral
Mechanical Trail
64.6mm
61.8mm
56.1mm
56.1mm
53.3mm
Wheel Flop
20.5mm
19.1mm
16.4mm
16.4mm
15.1mm
Standover Height
740mm
762mm
788mm
808mm
828mm
Tire to Pedal Spindle
73mm
165 mm cranks
75mm
170 mm cranks
75.5mm
172.5 mm cranks
82.5mm
172.5 mm cranks
95mm
175 mm cranks
Pedal Spindle to Ground Clearance
102mm
165 mm cranks
99mm
170 mm cranks
96.5mm
172.5 mm cranks
98.5mm
172.5 mm cranks
96mm
175 mm cranks

Base Build

50
52
54
56
58
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
700C/29 in
622 mm BSD
Tire Width
28mm
28mm
28mm
28mm
28mm
Tire Width Max
32mm
32mm
32mm
32mm
32mm
Tire Outer Diameter
678mm
678mm
678mm
678mm
678mm
Bike Length with Tires
1655mm
1662mm
1665mm
1674mm
1689mm
Crank Length
165mm
170mm
172.5mm
172.5mm
175mm
Handlebar Width
40mm
42mm
42mm
44mm
44mm
Stem Length
90mm
90mm
100mm
100mm
110mm
Stem Angle
8deg
8deg
8deg
8deg
8deg

Published Sizing Recommendations

Height
158 cm
to
166 cm
166 cm
to
173 cm
173 cm
to
179 cm
178 cm
to
183 cm
182 cm
to
187 cm

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
Performance Road
Source:https://www.posst.bike/oban