2025 Calibre Bikes Bossnut Base S
Build
700C/29 in × 2.4 in
Insights
Somewhat upright stack and reach vs trend of full-suspension trail mtb bikes
Design deviates from other sizes of Calibre Bikes Bossnut
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 626mm |
| Reach | 425mm |
| Stack to Reach Ratio | 1.47:1 |
| Seat Tube Length, Unknown | 390mm |
| Top Tube Length, Effective/Horizontal Unknown | 558mm |
| Top Tube Slope | 25.8deg |
| Head Tube Angle | 64.5deg |
| Seat Tube Angle | 78deg |
| Effective Seat Tube Angle, ETT HT Top | 72deg |
| Head Tube Length | 110mm |
| Bottom Bracket Drop | 38mm |
| Bottom Bracket Height | 334mm |
| Chainstay Length | 445mm |
| Chainstay Length Horizontal | 443.4mm |
| Front-Center | 752.6mm |
| Front-Center Horizontal | 751.6mm |
| Wheelbase | 1195mm |
| Fork Offset/Rake | 42mm |
| Fork Length, Unknown | 140mm |
| Trail | 130.9mm very high |
| Mechanical Trail | 118.1mm |
| Wheel Flop | 50.9mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 210.6mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 164mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 743.9mm |
| Bike Length with Tires | 1938.9mm |
| Crank Length | 170mm |
| Handlebar Width | 780mm |
| Suspension Type | Full suspension |
| Bar Type | Flat Bar |
| Fork Travel | 140mm |
| Rear Travel | 135mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Unknown |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 5 ft 6 in to 5 ft 10 in |
Source:https://www.pinkbike.com/news/review-calibre-bossnut-2025.html#geometry