2025 ULT.RA Kross Esker 5.0 Base XL (21") 28"
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 | 624mm |
| Reach | 406mm |
| Stack to Reach Ratio | 1.54:1 |
| Seat Tube Length, C-T | 535mm |
| Top Tube Length, Effective/Horizontal Center | 591mm |
| Top Tube Slope | 11.2deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 175mm |
| Bottom Bracket Drop | 75mm |
| Bottom Bracket Height | 281mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 423.4mm |
| Front-Center | 657.9mm |
| Front-Center Horizontal | 653.6mm |
| Wheelbase | 1077mm |
| Fork Offset/Rake | 55.4mm |
| Trail | 64mm mid/neutral |
| Mechanical Trail | 60.5mm |
| Wheel Flop | 19.7mm |
| Tire to Pedal Spindle Distance With 175 mm cranks | 126.9mm |
| Pedal Spindle to Ground Clearance With 175 mm cranks | 106mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 45mm |
| Tire Outer Diameter | 712mm |
| Bike Length with Tires | 1789mm |
| Crank Length | 175mm |
| Handlebar Width | 440mm |
| Stem Length | 80mm |
| Stem Angle | 12deg |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Aluminum |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 181 cm to 187 cm |
Source:https://kross.pl/esker-5-0-ult-ra-perlowy-holo-polysk