2026 Jan Janssen Spirit Base S
Build
700C/29 in × 40 mm
Insights
Somewhat upright stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Jan Janssen Spirit
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 552mm |
| Reach | 362mm |
| Stack to Reach Ratio | 1.52:1 |
| Seat Tube Length, Effective Center | 500mm |
| Top Tube Length, Effective/Horizontal Center | 536mm |
| Top Tube Length, Actual C-C | 520.2mm |
| Top Tube Slope | 8.1deg |
| Head Tube Angle | 69.5deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 120mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 281mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 424.3mm |
| Front-Center | 595.9mm |
| Front-Center Horizontal | 591.7mm |
| Wheelbase | 1016mm |
| Fork Offset/Rake | 45mm |
| Fork Length (Axle-To-Crown) | 400mm |
| Trail | 83.2mm very high |
| Mechanical Trail | 77.9mm |
| Wheel Flop | 27.3mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 74.9mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 111mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 40mm |
| Tire Outer Diameter | 702mm |
| Bike Length with Tires | 1718mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Unknown |
| Fork Material | Unknown |
| Brake Type | Unknown |
Source:https://www.janjanssen.nl/fietsen/gravel/Spirit