2015 Specialized Bicycles Amira Base

Design
Drop Bar, Rigid, non-suspension corrected
Frame
Carbon/Composite
Fork
Carbon/Composite
Features
Rim brake, Women's
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Somewhat upright stack and reachvs category

Geometry

44
48
51
54
56
Stack
503mm
515mm
528mm
547mm
567mm
Reach
365mm
371mm
378mm
378mm
380mm
Stack to Reach Ratio
1.38:1
1.39:1
1.4:1
1.45:1
1.49:1
Seat Tube Length, C-T
440mm
480mm
510mm
540mm
560mm
Top Tube Length, Effective/Horizontal Center
498mm
506mm
518mm
537mm
548mm
Top Tube Slope
9.2deg
5.8deg
3.9deg
3deg
3.2deg
Head Tube Angle
70.5deg
71.25deg
72deg
72deg
72deg
Seat Tube Angle
76deg
75.75deg
75.5deg
74deg
73.5deg
Head Tube Length
105mm
115mm
125mm
145mm
165mm
Bottom Bracket Drop
73mm
73mm
73mm
73mm
71.5mm
Bottom Bracket Height
263mm
263mm
263mm
263mm
264.5mm
Chainstay Length
405mm
405mm
405mm
405mm
408mm
Chainstay Length Horizontal
398.4mm
398.4mm
398.4mm
398.4mm
401.7mm
Front-Center
576mm
580mm
582mm
588mm
596mm
Front-Center Horizontal
571.6mm
575.6mm
577.6mm
583.6mm
591.3mm
Wheelbase
970mm
974mm
976mm
982mm
993mm
Fork Offset/Rake
51mm
51mm
49mm
49mm
49mm
Trail
64.9mm
mid/​neutral
60.2mm
mid/​neutral
57.7mm
mid/​neutral
57.7mm
mid/​neutral
57.7mm
mid/​neutral
Mechanical Trail
61.2mm
57mm
54.8mm
54.8mm
54.8mm
Wheel Flop
20.4mm
18.3mm
16.9mm
16.9mm
16.9mm
Standover Height
692mm
718mm
735mm
758mm
777mm
Tire to Pedal Spindle
75mm
165 mm cranks
79mm
165 mm cranks
76mm
170 mm cranks
82mm
170 mm cranks
87.5mm
172.5 mm cranks
Pedal Spindle to Ground Clearance
98mm
165 mm cranks
98mm
165 mm cranks
93mm
170 mm cranks
93mm
170 mm cranks
92mm
172.5 mm cranks

Base Build

44
48
51
54
56
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
25mm
25mm
25mm
25mm
25mm
Tire Outer Diameter
672mm
672mm
672mm
672mm
672mm
Bike Length with Tires
1642mm
1646mm
1648mm
1654mm
1665mm
Crank Length
165mm
165mm
170mm
170mm
172.5mm
Handlebar Width
360mm
380mm
400mm
400mm
420mm
Stem Length
75mm
75mm
90mm
100mm
100mm

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
Category Trend
Performance Road
Source:https://www.specialized.com/us/en/amira-sl4-comp/p/65598?color=174547-65598