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