1998 Principia Gaia Base 55
Build
700C/29 in × 23 mm
Insights
Very aggressive 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 | 538mm |
| Reach | 401mm |
| Stack to Reach Ratio | 1.34:1 |
| Seat Tube Length, C-T | 580mm |
| Top Tube Length, Effective/Horizontal Center | 555mm |
| Top Tube Length, Actual C-C | 555mm |
| Top Tube Slope | 0deg |
| Head Tube Angle | 73deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 132mm |
| Bottom Bracket Drop | 63mm |
| Bottom Bracket Height | 271mm |
| Chainstay Length | 406mm |
| Chainstay Length Horizontal | 401.1mm |
| Front-Center | 595mm |
| Front-Center Horizontal | 590.9mm |
| Wheelbase | 992mm |
| Fork Offset/Rake | 42.7mm |
| Trail | 57.4mm mid/neutral |
| Mechanical Trail | 54.9mm |
| Wheel Flop | 16.1mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 91mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 101mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 23mm |
| Tire Outer Diameter | 668mm |
| Bike Length with Tires | 1660mm |
| Crank Length | 170mm |
| Handlebar Width | 40mm |
| Stem Length | 80mm |
| Stem Angle | -17deg |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Aluminum |
| Fork Material | Aluminum |
| Brake Type | Rim |
Published Sizing Recommendations
| PBH | 83.5 cm to 87 cm |
Source:http://www.starbike.com/images/Principia/geo_road.htm