2021 Kona Bicycle Company Fire Mountain Base S
Build
650B/27.5 in × 2.25 in
Insights
Somewhat 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 | 585mm |
| Reach | 415mm |
| Stack to Reach Ratio | 1.41:1 |
| Seat Tube Length, Unknown | 370mm |
| Top Tube Length, Effective/Horizontal Unknown | 572mm |
| Top Tube Slope | 23.9deg |
| Head Tube Angle | 68deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 50mm |
| Bottom Bracket Height | 299.2mm |
| Chainstay Length | 435mm |
| Chainstay Length Horizontal | 432.1mm |
| Front-Center | 678mm |
| Front-Center Horizontal | 676.9mm |
| Wheelbase | 1109mm |
| Fork Offset/Rake | 42mm |
| Fork Length, Unknown | 490mm |
| Trail | 95.8mm very high |
| Mechanical Trail | 88.8mm |
| Wheel Flop | 33.3mm |
| Standover Height | 654.9mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 158.9mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 129.2mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.25in |
| Tire Outer Diameter | 698.3mm |
| Bike Length with Tires | 1807.3mm |
| 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