1998 Principia Gaia Base 61
Build
700C/29 in × 23 mm
Insights
Somewhat upright stack and reach vs trend of performance road bikes
Design deviates from other sizes of Principia Gaia
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 612.8mm |
| Reach | 398mm |
| Stack to Reach Ratio | 1.54:1 |
| Seat Tube Length, C-T | 640mm |
| Top Tube Length, Effective/Horizontal Center | 585mm |
| Top Tube Length, Actual C-C | 585mm |
| Top Tube Slope | 0deg |
| Head Tube Angle | 73.5deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 195mm |
| Bottom Bracket Drop | 67mm |
| Bottom Bracket Height | 267mm |
| Chainstay Length | 406mm |
| Chainstay Length Horizontal | 400.4mm |
| Front-Center | 605.3mm |
| Front-Center Horizontal | 601.6mm |
| Wheelbase | 1002mm |
| Trail | — — |
| Tire to Pedal Spindle Distance With 170 mm cranks | 101.3mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 97mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 23mm |
| Tire Outer Diameter | 668mm |
| Bike Length with Tires | 1670mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Aluminum |
| Fork Material | Aluminum |
| Brake Type | Rim |
Published Sizing Recommendations
| PBH | 91 cm to 94.5 cm |
Source:http://www.starbike.com/images/Principia/geo_road.htm