2026 CTM Bikes Koyuk CR Base 580
Build
700C/29 in × 45 mm
Insights
Average stack and reach vs trend of all-road/gravel bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 604mm |
| Reach | 397mm |
| Stack to Reach Ratio | 1.52:1 |
| Seat Tube Length, Unknown | 560mm |
| Top Tube Length, Effective/Horizontal Center | 588mm |
| Top Tube Slope | 7.1deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 72.5deg |
| Head Tube Length | 185mm |
| Bottom Bracket Drop | 68.2mm |
| Bottom Bracket Height | 287.8mm |
| Chainstay Length | 435mm |
| Chainstay Length Horizontal | 429.6mm |
| Front-Center | 643mm |
| Front-Center Horizontal | 639.4mm |
| Wheelbase | 1069mm |
| Fork Offset/Rake | 55mm |
| Fork Length, Unknown | 399mm |
| Trail | 64.4mm mid/neutral |
| Mechanical Trail | 60.9mm |
| Wheel Flop | 19.8mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 117mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 117.8mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 45mm |
| Tire Outer Diameter | 712mm |
| Bike Length with Tires | 1781mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 185 cm to 190 cm |
Source:www.ctm.sk