1999 Koga Miyata Roadrunner S Base 50
Build
700C/29 in × 37 mm
Insights
Very aggressive stack and reach vs trend of off-road touring bikes
Design deviates from other sizes of Koga Miyata Roadrunner S
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 475.8mm |
| Reach | 369.1mm |
| Stack to Reach Ratio | 1.29:1 |
| Seat Tube Length, C-T | 500mm |
| Top Tube Length, Effective/Horizontal Center | 525mm |
| Top Tube Length, Actual C-C | 525mm |
| Top Tube Slope | 0deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 72deg |
| Bottom Bracket Drop | 54mm |
| Bottom Bracket Height | 294mm |
| Chainstay Length | 450mm |
| Chainstay Length Horizontal | 446.8mm |
| Front-Center | 601mm |
| Front-Center Horizontal | 598.3mm |
| Wheelbase | 1045mm |
| Fork Offset/Rake | 50mm |
| Trail | 73.5mm high |
| Mechanical Trail | 69mm |
| Wheel Flop | 23.6mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 83mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 124mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 37mm |
| Tire Outer Diameter | 696mm |
| Bike Length with Tires | 1741mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Swept Back Bar |
| Fork Travel | 40mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Unknown |
| Brake Type | Rim |
Source:https://www.koga.com/fr/service/brochures/2000-1976.htm, https://www.restoration.bike/bike-catalogs/koga-miyata-catalogs/, https://drive.google.com/file/d/1dDZI3a7k9sQtIKl-6hnsOt21w6m582-K/view?usp=sharing