2021 Polygon Bikes Siskiu N9
- Design
- Moto/Klunker/Riser Bar, Full suspension
- Frame
- Aluminum
- Fork
- Aluminum
- Suspension
- 160mm fork travel
- Features
- Disc brake
Geometry
Small (27.5") | Medium (27.5") | Medium (29") | Large (29") | Extra Large (29") | |
Stack | 592.7mm | 592.7mm | 616.1mm | 626.1mm | 638.8mm |
Reach | 405mm | 435mm | 435mm | 456.6mm | 485mm |
Stack to Reach Ratio | 1.46:1 | 1.36:1 | 1.42:1 | 1.37:1 | 1.32:1 |
Seat Tube Length, C-T | 400mm | 430mm | 430mm | 470mm | 520mm |
Top Tube Length, Effective/Horizontal Center | 563.8mm | 593.8mm | 600.1mm | 624.5mm | 656.2mm |
Top Tube Slope | 22.1deg | 18deg | 20.2deg | 16.6deg | 12.4deg |
Head Tube Angle | 65.5deg | 65.5deg | 65.5deg | 65.5deg | 65.5deg |
Seat Tube Angle | 75deg | 75deg | 75deg | 75deg | 75deg |
Effective Seat Tube Angle, ETT HT Top | 71.5deg | 71.5deg | 69.5deg | 69.5deg | 69.5deg |
Head Tube Length | 100mm | 100mm | 90mm | 102mm | 115mm |
Bottom Bracket Drop | 5mm | 5mm | 33mm | 33mm | 33mm |
Bottom Bracket Height | 353mm | 353mm | 337.7mm | 337.7mm | 337.7mm |
Chainstay Length | 435mm | 435mm | 439.4mm | 439.4mm | 439.4mm |
Chainstay Length Horizontal | 435mm | 435mm | 438.2mm | 438.2mm | 438.2mm |
Front-Center | 719mm | 749mm | 757.5mm | 783.6mm | 817.8mm |
Front-Center Horizontal | 718.9mm | 748.9mm | 756.7mm | 782.9mm | 817.1mm |
Wheelbase | 1153.9mm | 1183.9mm | 1194.9mm | 1221.1mm | 1255.3mm |
Fork Offset/Rake | 42mm | 42mm | 51mm | 51mm | 51mm |
Trail | 117.1mm very high | 117.1mm very high | 112.9mm very high | 112.9mm very high | 112.9mm very high |
Mechanical Trail | 106.5mm | 106.5mm | 102.8mm | 102.7mm | 102.7mm |
Wheel Flop | 44.2mm | 44.2mm | 42.6mm | 42.6mm | 42.6mm |
Standover Height | 720.7mm | 718.8mm | 720mm | 743.1mm | 773.7mm |
Tire to Pedal Spindle | 190.9mm 170 mm cranks | 220.9mm 170 mm cranks | 216.8mm 170 mm cranks | 238mm 175 mm cranks | 272.1mm 175 mm cranks |
Pedal Spindle to Ground Clearance | 183mm 170 mm cranks | 183mm 170 mm cranks | 167.7mm 170 mm cranks | 162.7mm 175 mm cranks | 162.7mm 175 mm cranks |
N9 Build
Small (27.5") | Medium (27.5") | Medium (29") | Large (29") | Extra Large (29") | |
Wheel Size | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 2.6in | 2.6in | 2.35in | 2.35in | 2.35in |
Tire Outer Diameter | 716.1mm | 716.1mm | 741.4mm | 741.4mm | 741.4mm |
Bike Length with Tires | 1870mm | 1900mm | 1936.3mm | 1962.5mm | 1996.7mm |
Crank Length | 170mm | 170mm | 170mm | 175mm | 175mm |
Handlebar Width | 780mm | 780mm | 780mm | 780mm | 780mm |
Stem Length | 35mm | 35mm | 35mm | 35mm | 35mm |
Published Sizing Recommendations
Height | 5 ft 1 in to 5 ft 5 in | 5 ft 5 in to 5 ft 9 in | 5 ft 5 in to 5 ft 9 in | 5 ft 9 in to 6 ft 1 in | 6 ft 1 in to 6 ft 5 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 ScaleCategory Trend
Full-suspension All-mountain/Enduro MTBSource:https://www.bikesonline.com/2021-polygon-siskiu-n9-dual-suspension-mountain-bike