2020 Bird Bikes Aeris 145LT / AM160 Base

Design
Flat Bar, Full suspension
Suspension
160mm fork travel, 160mm rear travel, 30% sag
Features
Disc brake
Somewhat aggressive stack and reachvs category
Somewhat aggressive stack and reachvs category
Somewhat aggressive stack and reachvs category
Very aggressive stack and reachvs category
Very aggressive stack and reachvs category

Geometry

S
M
ML
L
XL
Stack
589mm
589mm
599mm
599mm
608mm
Reach
433mm
458mm
481mm
506mm
528mm
Stack to Reach Ratio
1.36:1
1.29:1
1.25:1
1.18:1
1.15:1
Seat Tube Length, Unknown
380mm
410mm
440mm
470mm
500mm
Top Tube Length, Effective/Horizontal HT Top
580mm
605mm
630mm
655mm
680mm
Top Tube Slope
22.7deg
18.9deg
16.3deg
13deg
10.8deg
Head Tube Angle
64.3deg
64.3deg
64.3deg
64.3deg
64.3deg
Seat Tube Angle
75deg
75deg
75deg
75deg
75deg
Head Tube Length
110mm
110mm
120mm
120mm
130mm
Bottom Bracket Drop
12mm
12mm
12mm
12mm
12mm
Bottom Bracket Height
343.5mm
343.5mm
343.5mm
343.5mm
343.5mm
Chainstay Length
435mm
435mm
435mm
435mm
435mm
Chainstay Length Horizontal
434.8mm
434.8mm
434.8mm
434.8mm
434.8mm
Front-Center
743.3mm
768.3mm
795.3mm
820.3mm
847.3mm
Front-Center Horizontal
743.2mm
768.2mm
795.2mm
820.2mm
847.2mm
Wheelbase
1178mm
1203mm
1230mm
1255mm
1282mm
Fork Offset/Rake
29.3mm
29.3mm
28.5mm
28.5mm
29.1mm
Fork Length (Axle-To-Crown)
542mm
542mm
542mm
542mm
542mm
Trail
138.6mm
very high
138.6mm
very high
139.4mm
very high
139.4mm
very high
138.8mm
very high
Mechanical Trail
124.9mm
124.9mm
125.6mm
125.6mm
125mm
Wheel Flop
54.2mm
54.2mm
54.5mm
54.5mm
54.2mm
Standover Height
699mm
699mm
700mm
700mm
704mm
Tire to Pedal Spindle
217.8mm
170 mm cranks
242.8mm
170 mm cranks
269.8mm
170 mm cranks
294.8mm
170 mm cranks
321.8mm
170 mm cranks
Pedal Spindle to Ground Clearance
173.5mm
170 mm cranks
173.5mm
170 mm cranks
173.5mm
170 mm cranks
173.5mm
170 mm cranks
173.5mm
170 mm cranks

Base Build

S
M
ML
L
XL
Wheel Size
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
Tire Width
2.5in
2.5in
2.5in
2.5in
2.5in
Tire Width Max
2.6in
2.6in
2.6in
2.6in
2.6in
Tire Outer Diameter
711mm
711mm
711mm
711mm
711mm
Bike Length with Tires
1889mm
1914mm
1941mm
1966mm
1993mm

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 Scale
Source:https://www.bird.bike/wp-content/uploads/2019/05/Aeris-AM160-2020-Technical-Data-Sheet.svg