2025 Principia Gravel C20 Base 50cm
Build
700C/29 in × 43 mm
Insights
Somewhat upright stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Principia Gravel C20
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 581.5mm |
| Reach | 369.6mm |
| Stack to Reach Ratio | 1.57:1 |
| Seat Tube Length, Unknown | 500mm |
| Top Tube Length, Actual C-C | 545mm |
| Top Tube Slope | 11.3deg |
| Head Tube Angle | 70.75deg |
| Seat Tube Angle | 73.2deg |
| Head Tube Length | 135mm |
| Bottom Bracket Drop | 82.5mm |
| Bottom Bracket Height | 271.5mm |
| Chainstay Length | 435mm |
| Chainstay Length Horizontal | 427.1mm |
| Front-Center | 602.5mm |
| Front-Center Horizontal | 596.8mm |
| Wheelbase | 1023.9mm |
| Fork Offset/Rake | 50mm |
| Trail | 70.7mm high |
| Mechanical Trail | 66.7mm |
| Wheel Flop | 22mm |
| Standover Height | 761.4mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 78.5mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 101.5mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 43mm |
| Tire Outer Diameter | 708mm |
| Bike Length with Tires | 1731.9mm |
| Crank Length | 170mm |
| Handlebar Width | 440mm |
| Stem Length | 90mm |
| Stem Angle | -6deg |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://principiabikes.com/gravel/gravel-carbon