2021 Polygon Bikes Siskiu T7 S (27.5″)

Build

650B/27.5 in × 2.4 in

Insights

Somewhat aggressive stack and reach vs trend of full-suspension trail mtb bikes
Design deviates from other sizes of Polygon Bikes Siskiu
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
593.5mm
Reach
440mm
Stack to Reach Ratio
1.35:1
Seat Tube Length, Unknown
385mm
Top Tube Length, Effective/Horizontal HT Top
582.5mm
Head Tube Angle
65deg
Effective Seat Tube Angle, Unknown
76.5deg
Head Tube Length
105mm
Bottom Bracket Drop
20mm
Bottom Bracket Height
333mm
Chainstay Length
425mm
Chainstay Length Horizontal
424.5mm
Front-Center
748.5mm
Front-Center Horizontal
748.3mm
Wheelbase
1172.8mm
Fork Offset/Rake
46mm
Trail
113.8mm
very high
Mechanical Trail
103.2mm
Wheel Flop
43.6mm
Standover Height
666.6mm
Tire to Pedal Spindle Distance
With 170 mm cranks
225.6mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
163mm

T7 Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
2.4in
Tire Outer Diameter
705.9mm
Bike Length with Tires
1878.7mm
Crank Length
170mm
Handlebar Width
780mm
Stem Length
35mm
Suspension Type
Full suspension
Bar Type
Flat Bar
Fork Travel
150mm
Rear Travel
140mm
Suspension Sag
Unknown
Frame Material
Aluminum
Fork Material
Unknown
Brake Type
Disc

Published Sizing Recommendations

Height
155 cm
to
168 cm
Source:https://www.bicyclesonline.com.au/2021-polygon-siskiu-t7-dual-suspension-mountain-bi