2025 FiftyOne Sika Base M
Build
700C/29 in × 40 mm
Insights
Somewhat upright stack and reach vs trend of performance road bikes
Design deviates from other sizes of FiftyOne Sika
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 555mm |
| Reach | 380mm |
| Stack to Reach Ratio | 1.46:1 |
| Seat Tube Length, C-T | 510mm |
| Top Tube Length, Effective/Horizontal Center | 546mm |
| Top Tube Slope | 7.2deg |
| Head Tube Angle | 71.2deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 134mm |
| Bottom Bracket Drop | 78mm |
| Bottom Bracket Height | 273mm |
| Chainstay Length | 420mm |
| Chainstay Length Horizontal | 412.7mm |
| Front-Center | 607mm |
| Front-Center Horizontal | 601.3mm |
| Wheelbase | 1014mm |
| Fork Offset/Rake | 56mm |
| Fork Length (Axle-To-Crown) | 388mm |
| Trail | 60.3mm mid/neutral |
| Mechanical Trail | 57.1mm |
| Wheel Flop | 18.4mm |
| Standover Height | 782.2mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 86mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 103mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 40mm |
| Tire Outer Diameter | 702mm |
| Bike Length with Tires | 1716mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Unknown |
| Fork Material | Unknown |
| Brake Type | Unknown |
Source:https://fiftyonebikes.com/wp-content/uploads/2024/04/FiftyOne-Sika-Geo-Bar-Stem-Table-.pdf