2019 Koski Bros. Bro Bomber Frameset 21.5
Build
650B/27.5 in × 2.8 in
Stack and Reach vs. Category Trend
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Geometry
| Stack | 576mm |
| Reach | 505mm |
| Stack to Reach Ratio | 1.14:1 |
| Seat Tube Length, C-T | 546mm |
| Top Tube Length, Effective/Horizontal Unknown | 670mm |
| Top Tube Slope | 4.5deg |
| Head Tube Angle | 67deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 135mm |
| Bottom Bracket Drop | 50mm |
| Bottom Bracket Height | 313.1mm |
| Chainstay Length | 432mm |
| Chainstay Length Horizontal | 429.1mm |
| Front-Center | 785mm |
| Front-Center Horizontal | 776.9mm |
| Wheelbase | 1206mm |
| Fork Offset/Rake | 44.8mm |
| Fork Length, Unknown | 465mm |
| Trail | 105.5mm very high |
| Mechanical Trail | 97.1mm |
| Wheel Flop | 38mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 251.9mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 143.1mm |
Frameset Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 2.8in |
| Tire Outer Diameter | 726.2mm |
| Bike Length with Tires | 1932.2mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
| Features | Single-speed capable |
Source:https://www.somafabshop.com/shop/product/koski-bros-frameset-bro-bomber-white-2219