2025 FiftyOne Sika Base S
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 | 537mm |
| Reach | 370mm |
| Stack to Reach Ratio | 1.45:1 |
| Seat Tube Length, C-T | 490mm |
| Top Tube Length, Effective/Horizontal Center | 526mm |
| Top Tube Slope | 7.4deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 115.7mm |
| Bottom Bracket Drop | 78mm |
| Bottom Bracket Height | 273mm |
| Chainstay Length | 418mm |
| Chainstay Length Horizontal | 410.7mm |
| Front-Center | 592mm |
| Front-Center Horizontal | 587.3mm |
| Wheelbase | 998mm |
| Fork Offset/Rake | 56mm |
| Fork Length (Axle-To-Crown) | 388mm |
| Trail | 61.6mm mid/neutral |
| Mechanical Trail | 58.3mm |
| Wheel Flop | 19mm |
| Standover Height | 763.2mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 71mm |
| 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 | 1700mm |
| 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