2025 Principia Gravel C20 Base 52cm
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 | 597.7mm |
| Reach | 379.4mm |
| Stack to Reach Ratio | 1.58:1 |
| Seat Tube Length, Unknown | 520mm |
| Top Tube Length, Actual C-C | 560mm |
| Top Tube Slope | 10.7deg |
| Head Tube Angle | 71.25deg |
| Seat Tube Angle | 73.2deg |
| Head Tube Length | 150mm |
| Bottom Bracket Drop | 82.5mm |
| Bottom Bracket Height | 271.5mm |
| Chainstay Length | 435mm |
| Chainstay Length Horizontal | 427.1mm |
| Front-Center | 612.7mm |
| Front-Center Horizontal | 607.1mm |
| Wheelbase | 1034.2mm |
| Fork Offset/Rake | 50mm |
| Trail | 67.4mm high |
| Mechanical Trail | 63.8mm |
| Wheel Flop | 20.5mm |
| Standover Height | 778.8mm |
| Tire to Pedal Spindle Distance With 172.5 mm cranks | 86.2mm |
| Pedal Spindle to Ground Clearance With 172.5 mm cranks | 99mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 43mm |
| Tire Outer Diameter | 708mm |
| Bike Length with Tires | 1742.2mm |
| Crank Length | 172.5mm |
| Handlebar Width | 440mm |
| Stem Length | 100mm |
| 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