2023 POSST Object Base

Design
Drop Bar, Rigid, non-suspension corrected
Frame
Steel
Fork
Carbon/Composite
Features
Rim brake
Learn More
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Somewhat upright stack and reachvs category
Somewhat upright stack and reachvs category

Geometry

50
52
54
56
58
Stack
530mm
540mm
560mm
580mm
600mm
Reach
375mm
380mm
384mm
389mm
397mm
Stack to Reach Ratio
1.41:1
1.42:1
1.46:1
1.49:1
1.51:1
Seat Tube Length, C-T
450mm
480mm
520mm
540mm
560mm
Top Tube Length, Effective/Horizontal HT Top
512mm
525mm
541mm
561mm
575mm
Top Tube Slope
11deg
8.6deg
6.5deg
6.6deg
6.5deg
Head Tube Angle
71deg
71.5deg
72.2deg
73deg
73.5deg
Seat Tube Angle
75.5deg
75deg
74.3deg
73.5deg
73.5deg
Head Tube Length
115mm
124mm
144mm
162mm
181mm
Bottom Bracket Drop
77mm
77mm
75mm
75mm
75mm
Bottom Bracket Height
262mm
262mm
264mm
264mm
264mm
Chainstay Length
415mm
415mm
415mm
415mm
415mm
Chainstay Length Horizontal
407.8mm
407.8mm
408.2mm
408.2mm
408.2mm
Front-Center
581mm
585mm
590mm
593mm
602mm
Front-Center Horizontal
576.2mm
580.2mm
584.8mm
588.8mm
606.8mm
Wheelbase
984mm
988mm
993mm
997mm
1015mm
Fork Offset/Rake
43mm
43mm
43mm
43mm
43mm
Fork Length, Unknown
367mm
367mm
367mm
367mm
367mm
Trail
71.3mm
high
68.1mm
high
63.7mm
mid/​neutral
58.7mm
mid/​neutral
55.6mm
mid/​neutral
Mechanical Trail
67.4mm
64.6mm
60.6mm
56.1mm
53.3mm
Wheel Flop
21.9mm
20.5mm
18.5mm
16.4mm
15.1mm
Standover Height
712mm
735mm
769mm
787mm
807mm
Tire to Pedal Spindle
72mm
170 mm cranks
76mm
170 mm cranks
78.5mm
172.5 mm cranks
81.5mm
172.5 mm cranks
88mm
175 mm cranks
Pedal Spindle to Ground Clearance
92mm
170 mm cranks
92mm
170 mm cranks
91.5mm
172.5 mm cranks
91.5mm
172.5 mm cranks
89mm
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
28mm
28mm
28mm
28mm
28mm
Tire Outer Diameter
678mm
678mm
678mm
678mm
678mm
Bike Length with Tires
1662mm
1666mm
1671mm
1675mm
1693mm
Crank Length
170mm
170mm
172.5mm
172.5mm
175mm
Handlebar Width
420mm
420mm
420mm
440mm
440mm
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
PBH
71 cm
to
75 cm
74 cm
to
78 cm
77 cm
to
82 cm
80 cm
to
84 cm
82 cm
to
86 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/object