Specialized Sirrus Pro

2011 UrbanFitness Manufacturer page

Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 10 34–50t / 11–32t
Gear range: 428%
Frame: Carbon
Brakes: Rim brake

Not published by the manufacturer

Sizes and geometry

Components

13 of 22 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

Specialized FACT 8r carbon, FACT IS construction, compact race design w/ Zertz inserts, 1-1/8"" - 1 3/8"" head tube, threaded BB Not identified

Suspension

1 part

Fork
- Specialized

Drivetrain

7 parts

Bottom bracket

With Crankset Not identified
Cassette
- SRAM 11–32t
Chain
- KMC
Crankset
- SRAM
Front derailleur
- SRAM Apex 10 speeds
Rear derailleur
- SRAM Apex 10 speeds
Shifters
- SRAM Apex

Brakes

2 parts

Brake levers

Forged alloy Not identified
Brakes
- Tektro

Wheels and tires

5 parts

Front hub

Forged alloy Hub, sealed bearings, 28 hole, for J bend round spokes Not identified
Rear hub

Forged alloy, sealed, cassette, QR, 32h Not identified
Rims
- Mavic
Spokes

Stainless 14g Not identified
Tires
- Specialized

Cockpit and contact points

6 parts

Handlebar
- Specialized
Headset

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

Black cage, body & toe clips w/ strap Not identified
Saddle

Body Geometry Riva Road, w/ steel rails Not identified
Seatpost
- Specialized
Stem
- Specialized

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Fork material: Carbon

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 34
Largest chainring: 50
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 32
Lowest gear: 30.8 in
Highest gear: 131.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire width: 23c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

2 measures

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

Lowest gear

30.8 gear inches

This value is above the central range for this class.

Cohort: Urban / Fitness Model year: 2011
Sample: 47 bicycles with this information
Coverage: 97.9% of the class

Highest gear

131.8 gear inches

This value is above the central range for this class.

Cohort: Urban / Fitness Model year: 2011
Sample: 47 bicycles with this information
Coverage: 97.9% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.8 km/h
Highest gear: 50.5 km/h

Total gear range 428%

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: 30.8–131.8 gear inches
Class reference (p10–p90): 23.9–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Fitness Model year: 2011
Lowest gear: 47 bicycles with this information, 97.9% of the class
Highest gear: 47 bicycles with this information, 97.9% 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 2011 builds

Differences across 2011 builds
Specification	This bicycle Specialized Sirrus Pro	Specialized Sirrus	Specialized Sirrus Comp	Specialized Sirrus Elite	Specialized Sirrus Elite Disc	Specialized Sirrus Expert
Frame
Frame material	Carbon	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum
Fork material	Carbon	Steel	Carbon	Carbon	Aluminum	Carbon
Drivetrain
Front chainrings	2	3	3	3	3	2
Smallest chainring	34	28	26	28	28	34
Largest chainring	50	48	48	48	48	50
Rear sprockets	10	7	9	8	8	10
Smallest sprocket	11	12	11	11	11	11
Lowest gear	30.8 in	25.4 in	23.6 in	25.4 in	25.4 in	30.8 in
Highest gear	131.8 in	116.0 in	126.6 in	126.6 in	126.6 in	131.8 in
Brakes
Brake type	Rim brake	Rim brake	Rim brake	Rim brake	Mechanical disc	Rim brake
Other specifications
Bottom bracket standard	BSA	Not informed	Not informed	Not informed	Not informed	Not informed
Tire width	23c	32c	28c	32c	32c	28c
Travel	Configuration: Rigid	Configuration: RigidFront: Additional specification: Not available: Yes	Configuration: Rigid	Configuration: Rigid	Configuration: Rigid	Configuration: Rigid