2023 CHIRU Alpin Base L
Build
700C/29 in × 50 mm
Insights
Somewhat aggressive stack and reach vs trend of progressive gravel bikes
Design deviates from other sizes of CHIRU Alpin
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 615mm |
| Reach | 443.8mm |
| Stack to Reach Ratio | 1.39:1 |
| Seat Tube Length, C-T | 475mm |
| Top Tube Length, Effective/Horizontal Center | 600mm |
| Top Tube Slope | 15.4deg |
| Head Tube Angle | 68.3deg |
| Seat Tube Angle | 74.1deg |
| Head Tube Length | 180mm |
| Bottom Bracket Drop | 68mm |
| Bottom Bracket Height | 293mm |
| Chainstay Length | 435mm |
| Chainstay Length Horizontal | 429.7mm |
| Front-Center | 718.6mm |
| Front-Center Horizontal | 715.4mm |
| Wheelbase | 1145mm |
| Fork Offset/Rake | 50mm |
| Fork Length (Axle-To-Crown) | 427mm |
| Trail | 89.9mm very high |
| Mechanical Trail | 83.5mm |
| Wheel Flop | 30.9mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 187.6mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 123mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 50mm |
| Tire Outer Diameter | 722mm |
| Bike Length with Tires | 1867mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Titanium |
| Fork Material | Titanium |
| Brake Type | Disc |
Source:https://www.chirubikes.com/en/kit-cadre/alpin/