2021 Polygon Bikes Siskiu N9 Medium (27.5")
Build
650B/27.5 in × 2.6 in
Insights
Somewhat aggressive stack and reach vs trend of full-suspension all-mountain/enduro mtb bikes
Design deviates from other sizes of Polygon Bikes Siskiu
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Bar type unusual for category
This: Moto/Klunker/Riser Bar
Category: Flat Bar
vs full-suspension all-mountain/enduro mtb bikesCategory: Flat Bar
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 592.7mm |
| Reach | 435mm |
| Stack to Reach Ratio | 1.36:1 |
| Seat Tube Length, C-T | 430mm |
| Top Tube Length, Effective/Horizontal Center | 593.8mm |
| Top Tube Slope | 18deg |
| Head Tube Angle | 65.5deg |
| Seat Tube Angle | 75deg |
| Effective Seat Tube Angle, ETT HT Top | 71.5deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 5mm |
| Bottom Bracket Height | 353mm |
| Chainstay Length | 435mm |
| Chainstay Length Horizontal | 435mm |
| Front-Center | 749mm |
| Front-Center Horizontal | 748.9mm |
| Wheelbase | 1183.9mm |
| Fork Offset/Rake | 42mm |
| Trail | 117.1mm very high |
| Mechanical Trail | 106.5mm |
| Wheel Flop | 44.2mm |
| Standover Height | 718.8mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 220.9mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 183mm |
N9 Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.6in |
| Tire Outer Diameter | 716.1mm |
| Bike Length with Tires | 1900mm |
| Crank Length | 170mm |
| Handlebar Width | 780mm |
| Stem Length | 35mm |
| Suspension Type | Full suspension |
| Bar Type | Moto/Klunker/Riser Bar |
| Fork Travel | 160mm |
| Rear Travel | Unknown |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Aluminum |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 5 ft 5 in to 5 ft 9 in |
Source:https://www.bikesonline.com/2021-polygon-siskiu-n9-dual-suspension-mountain-bike