2025 Koga Colmaro Extreme S
Build
700C/29 in × 50 mm
Insights
Somewhat aggressive stack and reach vs trend of all-road/gravel bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 577mm |
| Reach | 390mm |
| Stack to Reach Ratio | 1.48:1 |
| Seat Tube Length, C-T | 490mm |
| Top Tube Slope | 11.5deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 110mm |
| Bottom Bracket Drop | 75mm |
| Bottom Bracket Height | 286mm |
| Chainstay Length | 442mm |
| Chainstay Length Horizontal | 435.6mm |
| Front-Center | 622mm |
| Front-Center Horizontal | 617.4mm |
| Wheelbase | 1053mm |
| Fork Offset/Rake | 51mm |
| Trail | 70.4mm high |
| Mechanical Trail | 66.5mm |
| Wheel Flop | 21.7mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 91mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 116mm |
Extreme Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 50mm |
| Tire Outer Diameter | 722mm |
| Bike Length with Tires | 1775mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Aluminum |
| Fork Material | N/A |
| Brake Type | Disc |
Source:https://www.koga.com/nl/racefietsen/colmaro-extreme-turtle-green.htm?frame=H