2021 Stern Motion 1.0 27.5"

Design
Flat Bar, Hardtail (Front suspension)
Frame
Aluminum
Fork
Aluminum
Suspension
100mm fork travel
Features
Disc brake
Somewhat upright stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Somewhat upright stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Somewhat upright stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Geometry

14
16
18
20
22
Stack
602mm
602mm
613mm
626mm
626mm
Reach
390mm
395mm
401mm
411mm
427mm
Stack to Reach Ratio
1.54:1
1.52:1
1.53:1
1.52:1
1.47:1
Seat Tube Length, Unknown
356mm
406mm
457mm
508mm
559mm
Top Tube Length, Effective/Horizontal Unknown
572mm
577mm
587mm
601mm
620mm
Top Tube Slope
27.9deg
22.6deg
18.2deg
14.1deg
8.8deg
Head Tube Angle
70deg
70deg
70deg
70deg
70deg
Seat Tube Angle
73deg
73deg
73deg
73deg
73deg
Head Tube Length
105mm
105mm
115mm
130mm
130mm
Bottom Bracket Drop
45mm
45mm
45mm
45mm
45mm
Bottom Bracket Height
300.3mm
249.1mm
249.1mm
249.1mm
249.1mm
Chainstay Length
440mm
440mm
440mm
440mm
440mm
Chainstay Length Horizontal
437.7mm
437.7mm
437.7mm
437.7mm
437.7mm
Front-Center
634.9mm
639.9mm
649.9mm
664.8mm
682.8mm
Front-Center Horizontal
633.3mm
638.3mm
648.3mm
663.3mm
681.3mm
Wheelbase
1071mm
1076mm
1086mm
1101mm
1119mm
Fork Offset/Rake
38.1mm
38.1mm
38.1mm
38.4mm
40.3mm
Trail
85.1mm
very high
66.5mm
high
66.5mm
high
66.2mm
high
64.2mm
mid/​neutral
Mechanical Trail
80mm
62.5mm
62.5mm
62.2mm
60.3mm
Wheel Flop
27.4mm
21.4mm
21.4mm
21.3mm
20.6mm
Tire to Pedal Spindle
119.6mm
170 mm cranks
175.8mm
170 mm cranks
185.8mm
170 mm cranks
200.7mm
170 mm cranks
218.7mm
170 mm cranks
Pedal Spindle to Ground Clearance
130.3mm
170 mm cranks
79.1mm
170 mm cranks
79.1mm
170 mm cranks
79.1mm
170 mm cranks
79.1mm
170 mm cranks

1.0 27.5" Build

14
16
18
20
22
Wheel Size
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
Tire Width
2.1in
2.1mm
2.1mm
2.1mm
2.1mm
Tire Outer Diameter
690.7mm
588.2mm
588.2mm
588.2mm
588.2mm
Bike Length with Tires
1761.7mm
1664.2mm
1674.2mm
1689.2mm
1707.2mm

Published Sizing Recommendations

Height
135 cm
to
155 cm
150 cm
to
165 cm
165 cm
to
175 cm
175 cm
to
185 cm
185 cm
to
195 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
Source:https://www.sportmaster.ru/product/21092240299/