2024 Bird Bikes Aeris AM Base 29"
- Category
- Hardtail All-mountain/Enduro MTB
- Design
- Flat Bar, Full suspension
- Frame
- Carbon/Composite
- Suspension
- 160mm fork travel, 160mm rear travel
- Features
- Disc brake
Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
R1 [Small] | R2 [Medium] | R3 [ML] | R4 [Large] | RS (XL) | |
Stack | 618mm | 618mm | 627mm | 636mm | 645mm |
Reach | 425mm | 450mm | 475mm | 500mm | 525mm |
Stack to Reach Ratio | 1.45:1 | 1.37:1 | 1.32:1 | 1.27:1 | 1.23:1 |
Seat Tube Length, C-T | 370mm | 390mm | 420mm | 445mm | 470mm |
Top Tube Length, Effective/Horizontal Unknown | 568mm | 593mm | 614mm | 635mm | 656mm |
Top Tube Slope | 26.9deg | 23.9deg | 21deg | 18.7deg | 16.6deg |
Head Tube Angle | 64deg | 64deg | 64deg | 64deg | 64deg |
Seat Tube Angle | 77deg | 77deg | 77.5deg | 78deg | 78.5deg |
Head Tube Length | 100mm | 100mm | 110mm | 120mm | 130mm |
Bottom Bracket Drop | 30mm | 30mm | 30mm | 30mm | 30mm |
Bottom Bracket Height | 340mm | 340mm | 340mm | 340mm | 340mm |
Chainstay Length | 440mm | 440mm | 440mm | 440mm | 440mm |
Chainstay Length Horizontal | 439mm | 439mm | 439mm | 439mm | 439mm |
Front-Center | 759mm | 784mm | 813mm | 842mm | 862mm |
Front-Center Horizontal | 759mm | 784mm | 813mm | 842mm | 872mm |
Wheelbase | 1198mm | 1223mm | 1252mm | 1281mm | 1311mm |
Fork Offset/Rake | 42.5mm | 42.5mm | 42.1mm | 41.8mm | 42.3mm |
Fork Length (Axle-To-Crown) | 571mm | 571mm | 571mm | 571mm | 571mm |
Trail | 133.2mm very high | 133.2mm very high | 133.6mm very high | 134mm very high | 133.4mm very high |
Mechanical Trail | 119.7mm | 119.7mm | 120.1mm | 120.4mm | 119.9mm |
Wheel Flop | 52.5mm | 52.5mm | 52.6mm | 52.8mm | 52.6mm |
Tire to Pedal Spindle | 219mm 170 mm cranks | 244mm 170 mm cranks | 273mm 170 mm cranks | 302mm 170 mm cranks | 322mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 170mm 170 mm cranks | 170mm 170 mm cranks | 170mm 170 mm cranks | 170mm 170 mm cranks | 170mm 170 mm cranks |
Base 29" Build
R1 [Small] | R2 [Medium] | R3 [ML] | R4 [Large] | RS (XL) | |
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 2.5in | 2.5in | 2.5in | 2.5in | 2.5in |
Tire Width Max | 2.5in | 2.5in | 2.5in | 2.5in | 2.5in |
Tire Outer Diameter | 740mm | 740mm | 740mm | 740mm | 740mm |
Bike Length with Tires | 1938mm | 1963mm | 1992mm | 2021mm | 2051mm |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
Hardtail All-mountain/Enduro MTBSource:https://www.bird.bike/aeris-am/