2021 Kona Bicycle Company Fire Mountain Base XS
Build
650B/27.5 in × 2.25 in
Insights
Very aggressive stack and reach vs trend of hardtail trail mtb bikes
Design deviates from other sizes of Kona Bicycle Company Fire Mountain
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 556mm |
| Reach | 400mm |
| Stack to Reach Ratio | 1.39:1 |
| Seat Tube Length, Unknown | 331mm |
| Top Tube Length, Effective/Horizontal Unknown | 549mm |
| Top Tube Slope | 25.8deg |
| Head Tube Angle | 67.5deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 30mm |
| Bottom Bracket Height | 319.2mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 423.9mm |
| Front-Center | 662mm |
| Front-Center Horizontal | 661.1mm |
| Wheelbase | 1085mm |
| Fork Offset/Rake | 40mm |
| Fork Length, Unknown | 483mm |
| Trail | 101.3mm very high |
| Mechanical Trail | 93.6mm |
| Wheel Flop | 35.8mm |
| Standover Height | 639.9mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 142.9mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 149.2mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.25in |
| Tire Outer Diameter | 698.3mm |
| Bike Length with Tires | 1783.3mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 100mm |
| Suspension Sag | Unknown |
| Frame Material | Aluminum |
| Fork Material | Aluminum |
| Brake Type | Disc |
Source:https://konaworld.com/fire_mountain.cfm