2021 Polygon Bikes Siskiu T8 S (27.5″)
Build
650B/27.5 in × 2.6 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 | 338mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 424.5mm |
| Front-Center | 748.5mm |
| Front-Center Horizontal | 748.3mm |
| Wheelbase | 1172.8mm |
| Fork Offset/Rake | 37mm |
| Trail | 126.1mm very high |
| Mechanical Trail | 114.3mm |
| Wheel Flop | 48.3mm |
| Standover Height | 666.6mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 220.5mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 168mm |
T8 Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.6in |
| Tire Outer Diameter | 716.1mm |
| Bike Length with Tires | 1888.9mm |
| Suspension Type | Full suspension |
| Bar Type | Flat Bar |
| Fork Travel | 150mm |
| Rear Travel | Unknown |
| Suspension Sag | Unknown |
| Frame Material | Unknown |
| Fork Material | Unknown |
| Brake Type | Unknown |
Published Sizing Recommendations
| Height | 152.5 cm to 165 cm |
Source:https://www.polygonbikes.com/shop/bikes/mountain/trail/siskiu-t8-2/