2021 Cannondale Bikes F-Si Base XS
Build
650B/27.5 in × 2.25 in
Insights
Somewhat aggressive stack and reach vs trend of hardtail cross-country mtb bikes
Design deviates from other sizes of Cannondale Bikes F-Si
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 569mm |
| Reach | 380mm |
| Stack to Reach Ratio | 1.5:1 |
| Seat Tube Length, C-T | 330mm |
| Top Tube Length, Effective/Horizontal Center | 553mm |
| Top Tube Slope | 28deg |
| Head Tube Angle | 69deg |
| Seat Tube Angle | 73.1deg |
| Head Tube Length | 90mm |
| Bottom Bracket Drop | 45mm |
| Bottom Bracket Height | 304.2mm |
| Chainstay Length | 423mm |
| Chainstay Length Horizontal | 420.6mm |
| Front-Center | 636mm |
| Front-Center Horizontal | 634.4mm |
| Wheelbase | 1055mm |
| Fork Offset/Rake | 50mm |
| Trail | 80.5mm very high |
| Mechanical Trail | 75.1mm |
| Wheel Flop | 26.9mm |
| Standover Height | 715mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 116.9mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 134.2mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.25in |
| Tire Outer Diameter | 698.3mm |
| Bike Length with Tires | 1753.3mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 100mm |
| Suspension Sag | Unknown |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Unknown |
Source:https://www.cannondale.com/