2018 Chumba Cycles Ursa Major Base SM
Build
26 in × 5 in
Insights
Average stack and reach vs trend of rigid fatbike bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 607mm |
| Reach | 406mm |
| Stack to Reach Ratio | 1.5:1 |
| Seat Tube Length, C-T | 387.3mm |
| Top Tube Length, Effective/Horizontal Center | 595mm |
| Top Tube Slope | 24.5deg |
| Head Tube Angle | 69deg |
| Seat Tube Angle | 72.75deg |
| Head Tube Length | 128mm |
| Bottom Bracket Drop | 50mm |
| Bottom Bracket Height | 356.5mm |
| Chainstay Length | 439mm |
| Chainstay Length Max | 459mm |
| Chainstay Length Horizontal | 436.1mm |
| Chainstay Length Horizontal Max | 456.3mm |
| Front-Center | 671.7mm |
| Front-Center Horizontal | 669.9mm |
| Wheelbase | 1106mm |
| Wheelbase Max | 1126mm |
| Fork Offset/Rake | 46.7mm |
| Fork Length (Axle-To-Crown) | 483mm |
| Trail | 106mm very high |
| Mechanical Trail | 99mm |
| Wheel Flop | 35.5mm |
| Standover Height | 660.4mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 95.2mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 186.5mm |
Base Build
| Wheel Size | 26 inch (559mm BSD) |
| Tire Width | 5in |
| Tire Outer Diameter | 813mm |
| Bike Length with Tires | 1919mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Titanium |
| Fork Material | Unknown |
| Brake Type | Disc |
Source:https://www.chumbausa.com/ursa-major-titanium-fatbike/