2026 Jan Janssen Spirit Base M
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 | 586mm |
| Reach | 370mm |
| Stack to Reach Ratio | 1.58:1 |
| Seat Tube Length, Effective Center | 530mm |
| Top Tube Length, Effective/Horizontal Center | 552mm |
| Top Tube Length, Actual C-C | 534.5mm |
| Top Tube Slope | 8.5deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 150mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 281mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 424.3mm |
| Front-Center | 599.8mm |
| Front-Center Horizontal | 595.7mm |
| Wheelbase | 1020mm |
| Fork Offset/Rake | 45mm |
| Fork Length (Axle-To-Crown) | 400mm |
| Trail | 73.3mm high |
| Mechanical Trail | 69.3mm |
| Wheel Flop | 22.6mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 78.8mm |
| 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 | 1722mm |
| 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