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 bikes

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