2022 Bird Bikes Forge 140mm Fork Medium Long
Build
700C/29 in × 2.6 in
Insights
Somewhat upright stack and reach vs trend of hardtail all-mountain/enduro mtb bikes
Design deviates from other sizes of Bird Bikes Forge
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 663mm |
| Reach | 473mm |
| Stack to Reach Ratio | 1.4:1 |
| Seat Tube Length, C-T | 420mm |
| Top Tube Length, Effective/Horizontal HT Top | 630mm |
| Head Tube Angle | 65.8deg |
| Effective Seat Tube Angle, ETT HT Top | 76.8deg |
| Seat Tube Exit Angle | 75deg |
| Head Tube Length | 110mm |
| Bottom Bracket Drop | 87mm |
| Bottom Bracket Height | 290mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 421.1mm |
| Front-Center | 793.7mm |
| Front-Center Horizontal | 788.9mm |
| Wheelbase | 1210mm |
| Fork Offset/Rake | 42mm |
| Fork Length (Axle-To-Crown) | 509mm |
| Trail | 123.4mm very high |
| Mechanical Trail | 112.6mm |
| Wheel Flop | 46.1mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 246.6mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 120mm |
140mm Fork Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.6in |
| Tire Outer Diameter | 754.1mm |
| Bike Length with Tires | 1964.1mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 140mm |
| Suspension Sag | 30% |
| Frame Material | Steel |
| Fork Material | Unknown |
| Brake Type | Disc |
Source:https://www.bird.bike/wp-content/uploads/2022/03/Forge-Full-1.png