Specialized Sirrus

2010 UrbanFitness Manufacturer page

Suspension: Rigid
Wheels: 700c
Drivetrain: 3 × 8 28–48t / 11–32t
Gear range: 499%
Frame: Aluminum
Brakes: Rim brake

Rider height by size (cm)

Size guide

XS 156–166
SM 163–174
MD 171–182
LG 179–189
XL 185–195

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 Sirrus A1 Premium aluminum, fully manipulated tubing, compact design, hourglass speedstays, integrated headset Not identified

Suspension

1 part

Fork

Aluminum legs and crown w/ 7075 aluminum steerer, w/ rack eyelets Not identified

Drivetrain

7 parts

Bottom bracket

Sealed cartridge, square taper, 68mm Not identified
Cassette
- Shimano CS-HG40 11–32t
CS-HG40HG-40
Chain
- KMC
Z-51
Crankset
- Shimano FC-M191
FC-M191FCM-191
Front derailleur
- Shimano Altus
Rear derailleur
- Shimano Altus
Shifters
- Shimano ST-EF50
ST-EF50EF-50

Brakes

2 parts

Brake levers
- Shimano ST-EF50
ST-EF50EF-50
Brakes

Front: Forged 6061 aluminum V-Brake, 108mm linear pull, w/ standard pads, Rear: Forged 6061 aluminum V-Brake, 108mm linear pull, w/ standard pads 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
Spokes

Stainless 14g Not identified
Tires
- Specialized

Cockpit and contact points

6 parts

Handlebar
- Specialized
Headset

Cage bearings integrated HS. w/ 20mm of spacers w/ top cap Not identified
Pedals

Silver cage/black body, w/ black toe clips and strap Not identified
Saddle

Body Geometry ""Roulux"" w/ steel rails Not identified
Seatpost

Alloy, two-bolt clamp, 27.2mm Not identified
Stem

3D forged, 2-bolt, 25.4mm Not identified

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Geometry diagram unavailable

The drawing needs reach and stack, which the manufacturer did not publish. Available facts remain in the table.

Size Reported by the manufacturer

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Top tube lengthmm	530	545	560	580	600
Seat tube lengthmm	400	445	480	515	565
Head tube lengthmm	135	155	185	215	250
Head tube angle	70°	71.25°	71.5°	72°	72.5°
Seat tube angle	76°	75°	74°	73.5°	73°
Chainstay lengthmm	440	435	435	435	435
Wheelbasemm	1042	1038	1045	1056	1066
Front centermm	614	613	619	630	641
Bottom bracket dropmm	76	74	70	70	70
Standover heightmm	727	763	796	824	860
Fork rakemm	51	51	51	51	51
Trailmm	73	65	63	60	57
Suspension and parts
Crank lengthmm	170	170	175	175	175
Handlebar widthmm	580	580	580	580	580
Stem lengthmm	90	100	100	110	120

Not published by the manufacturer: Reach, Stack, Bottom bracket height, Stack/reach ratio, Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

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

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 28
Largest chainring: 48
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 32
Lowest gear: 25.4 in
Highest gear: 126.6 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
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: 2010
Sample: 34 bicycles with this information
Coverage: 77.2% of the class

Highest gear

126.6 gear inches

This value is within the central range for this class.

Cohort: Urban / Fitness Model year: 2010
Sample: 34 bicycles with this information
Coverage: 77.2% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.7 km/h
Highest gear: 48.5 km/h

Total gear range 499%

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: 25.4–126.6 gear inches
Class reference (p10–p90): 23.6–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Fitness Model year: 2010
Lowest gear: 34 bicycles with this information, 77.2% of the class
Highest gear: 34 bicycles with this information, 77.2% 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 2010 builds

Differences across 2010 builds
Specification	This bicycle Specialized Sirrus	Specialized Sirrus Comp	Specialized Sirrus Elite	Specialized Sirrus Expert	Specialized Sirrus Sport
Frame
Fork material	Aluminum	Carbon	Carbon	Carbon	Carbon
Drivetrain
Smallest chainring	28	28	28	30	28
Largest chainring	48	48	48	50	48
Rear sprockets	8	9	9	10	8
Smallest sprocket	11	12	12	12	11
Largest sprocket	32	25	25	27	32
Lowest gear	25.4 in	32.5 in	32.5 in	32.2 in	25.4 in
Highest gear	126.6 in	116.0 in	116.0 in	120.8 in	126.6 in
Other specifications
Tire width	32c	28c	32c	28c	32c