2021 Stern Motion 1.0 27.5"
- Category
- Hardtail Cross-country MTB
- 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 ScaleCategory Trend
Hardtail Cross-country MTBSource:https://www.sportmaster.ru/product/21092240299/