Specialized Amira SL4 Pro Ui2 Mid-Compact

2012 RoadRace Manufacturer page

Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 10 36–52t / 11–28t
Gear range: 368%
Frame: Carbon
Brakes: Rim brake

Sizes

Size guide

44cm
48cm
51cm
54cm
56cm

The manufacturer did not publish rider heights for these sizes.

Components

12 of 18 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

FACT 10r carbon, FACT IS construction, women's tubesets, women's performance geometry, tapered 1-1/8"" to 1-3/8"" HT, OSBB Not identified

Suspension

1 part

Fork

FACT carbon, full monocoque, 1-1/8"" to 1-3/8"" tapered steerer Not identified

Drivetrain

7 parts

Bottom bracket

OS integrated, sealed bearings Not identified
Cassette
- Shimano Ultegra 11–28t
Chain
- Shimano Ultegra
Crankset
- Specialized
Front derailleur
- Shimano Ultegra
Rear derailleur
- Shimano Ultegra
Shifters
- Shimano Ultegra

Brakes

1 part

Brakes
- Shimano Ultegra

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Handlebar
- Specialized
Headset

1-1/8"" upper and 1-3/8"" lower Cr-Mo cartridge bearings, w/ 20mm carbon cone spacer and 20mm of carbon spacers Not identified
Pedals

Nylon flat test ride, loose ball, w/ reflectors Not identified
Saddle

Body Geometry Oura Expert Gel, hollow ti rails, 155mm Not identified
Seatpost
- Specialized
Stem
- Specialized

Sizes and geometry

5 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 51cm

Table

Reach 378mm

Stack 528mm

Wheelbase 976mm

Head angle 72.0°

Seat angle 75.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	365	371	378	378	380
Stackmm	503	515	528	547	564
Top tube lengthmm	498	506	518	537	548
Seat tube lengthmm	390	420	460	490	510
Head tube lengthmm	105	115	125	145	165
Head tube angle	70.5°	71.25°	72°	72°	72°
Seat tube angle	76°	75.75°	75.5°	74°	73.5°
Chainstay lengthmm	405	405	405	405	408
Wheelbasemm	970	974	976	982	993
Front centermm	576	580	582	588	596
Bottom bracket dropmm	73	73	73	73	71.5
Bottom bracket heightmm	263	263	263	263	264
Standover heightmm	692	718	735	758	777
Fork rakemm	51	51	49	49	49
Trailmm	66	62	59	59	59
Stack/reach ratio	1.38	1.39	1.40	1.45	1.48
Suspension and parts
Crank lengthmm	167.5	167.5	170	170	172.5
Handlebar widthmm	360	380	400	400	420
Stem lengthmm	75	75	90	100	100

Not published by the manufacturer: Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: womens
Frame material: Carbon
Fork material: Carbon

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 36
Largest chainring: 52
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 28
Lowest gear: 37.3 in
Highest gear: 137.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Electronic

Additional specifications

Tire width: 23c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

37.3 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2012
Sample: 134 bicycles with this information
Coverage: 99.2% of the class

Highest gear

137.1 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2012
Sample: 134 bicycles with this information
Coverage: 99.2% of the class

Shifting

Electronic

14 of 135 bicycles with this information use electronic shifting.

Cohort: Road / Race Model year: 2012
Sample: 135 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 14.3 km/h
Highest gear: 52.5 km/h

Total gear range 368%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 37.3–137.1 gear inches
Class reference (p10–p90): 32.9–139.7 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Race Model year: 2012
Lowest gear: 134 bicycles with this information, 99.2% of the class
Highest gear: 134 bicycles with this information, 99.2% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2012 builds

Differences across 2012 builds
Specification	This bicycle Specialized Amira SL4 Pro Ui2 Mid-Compact	Specialized Amira Compact Apex	Specialized Amira Compact	Specialized Amira Comp Compact	Specialized Amira Elite Compact	Specialized Amira SL4 Pro Mid-Compact
Drivetrain
Smallest chainring	36	34	34	34	34	36
Largest chainring	52	50	50	50	50	52
Smallest sprocket	11	11	12	11	11	11
Lowest gear	37.3 in	35.2 in	35.2 in	35.2 in	35.2 in	37.3 in
Highest gear	137.1 in	131.8 in	120.8 in	131.8 in	131.8 in	137.1 in
Cockpit
Shifting	Electronic	Mechanical	Mechanical	Mechanical	Mechanical	Mechanical
Other specifications
Bottom bracket standard	Not informed	BSA	BSA	BB30	BB30	Not informed