Specialized Sirrus

2011 UrbanFitness Manufacturer page

Suspension: Rigid
Wheels: 700c
Drivetrain: 3 × 7 28–48t / 12–32t
Gear range: 457%
Frame: Aluminum
Brakes: Rim brake

Not published by the manufacturer

Sizes and geometry

Components

10 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 A1 Premium aluminum, fully manipulated tubing, smooth weld compact design, internal cable routing, integrated headset,fender and rack eyelets Not identified

Suspension

1 part

Fork

Straight blade steel fork w/ rack eyelets Not identified

Drivetrain

7 parts

Bottom bracket

Sealed cartridge, square taper, 68mm Not identified
Cassette
- SRAM 12–32t
Chain
- KMC Z7 7 speeds
Z-7
Crankset
- Shimano FC-M131
FC-M131
Front derailleur
- Shimano
Rear derailleur
- Shimano Altus
Shifters
- Shimano ST-EF51
ST-EF51EF-51

Brakes

2 parts

Brake levers
- Shimano ST-EF51
ST-EF51EF-51
Brakes

Front: Die cast aluminum, 108mm linear pull, Rear: Die cast aluminum, 108mm linear pull Not identified

Wheels and tires

5 parts

Front hub

Forged alloy, sealed, QR, 32h Not identified
Rear hub

Forged alloy, double-sealed, cassette, QR, 32h Not identified
Rims
- Alex Rims
AS-14
Spokes

Stainless 14g Not identified
Tires
- Specialized

Cockpit and contact points

6 parts

Handlebar

Alloy, small rise, 25.4mm Not identified
Headset
- Cane Creek Headset Bearings
Pedals

Nylon flat pedal w/ reflectors Not identified
Saddle

Body Geometry Riva Road, 155mm width Not identified
Seatpost

Alloy, two-bolt clamp, 30.9mm Not identified
Stem

Alloy, CP bolt, 25.4mm Not identified

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Steel

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 28
Largest chainring: 48
Rear sprockets: 7
Smallest sprocket: 12
Largest sprocket: 32
Lowest gear: 25.4 in
Highest gear: 116.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 32c
Travel: Front: Additional specification: Not available: Yes
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

25.4 gear inches

This value is within 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

116.0 gear inches

This value is below 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: 9.7 km/h
Highest gear: 44.4 km/h

Total gear range 457%

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

Changes since 2010
Specification	2010 Specialized Sirrus	This bicycle Specialized Sirrus
Frame
Fork material	Aluminum	Steel
Drivetrain
Rear sprockets	8	7
Smallest sprocket	11	12
Highest gear	126.6 in	116.0 in
Other specifications
Travel	Configuration: Rigid	Configuration: RigidFront: Additional specification: Not available: Yes