Specialized Sirrus Single-Speed – Men's Spec

Name: Specialized Sirrus Single-Speed – Men's Spec
Brand: Specialized

2019 UrbanFitness Manufacturer page

Last known price: $450

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 1 × 1 42t / 17t
Gear range: 100%
Frame: Aluminum
Brakes: Rim brake

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

4 of 17 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 SL Premium Aluminum, Fitness Geometry, fully manipulated butted tubing Not identified

Suspension

1 part

Fork

Steel, V-brake, 1-1/8" steerer, QR, rack/fender mounts Not identified

Drivetrain

4 parts

Bottom bracket

BSA, square-taper, 68mm Not identified
Cassette
- SunRace
Chain
- KMC
Crankset

3-piece square-taper, forged alloy, 42T Not identified

Brakes

1 part

Brakes

Front: V-brake, linear pull, Rear: V-brake, linear pull Not identified

Wheels and tires

5 parts

Front hub

Loose ball bearings, 9x100mm spacing, 32h Not identified
Rear hub

Fixed gear, loose ball bearings, 10x120mm spacing, 32h Not identified
Rims

700C rim brake, double-wall alloy, 22mm depth, 21mm internal width, 32h Not identified
Spokes

Stainless, 14g Not identified
Tires

Front: Espoir Sport, 60 TPI, wire bead, double BlackBelt protection, 700x30mm, Rear: Espoir Sport, 60 TPI, wire bead, double BlackBelt protection, 700x30mm Not identified

Cockpit and contact points

5 parts

Handlebar

Double-butted alloy, 5-degree backsweep, 25.4mm Not identified
Pedals
- Specialized
Saddle
- Specialized
Seatpost

Alloy, 12mm offset, 2-bolt clamp, 27.2mm Not identified
Stem

10-degree rise, 25.4mm clamp Not identified

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 LG

Table

Reach 402mm

Stack 610mm

Wheelbase 1071mm

Head angle 71.5°

Seat angle 73.5°

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	388	400	402	414	426
Stackmm	564	592	610	638	670
Top tube lengthmm	555	575	583	603	631
Seat tube lengthmm	430	470	510	550	580
Head tube lengthmm	133	159	176	203	236
Head tube angle	70°	71°	71.5°	72°	72°
Seat tube angle	73.5°	73.5°	73.5°	73.5°	73°
Chainstay lengthmm	440	440	440	440	440
Wheelbasemm	1056	1068	1071	1087	1109
Front centermm	626	638	640	656	678
Bottom bracket dropmm	70	70	70	70	70
Bottom bracket heightmm	275	275	275	275	275
Standover heightmm	735	775	805	845	875
Fork rakemm	51	51	51	51	51
Trailmm	71	65	62	58	58
Stack/reach ratio	1.45	1.48	1.52	1.54	1.57
Suspension and parts
Crank lengthmm	170	170	170	175	175
Handlebar widthmm	580	580	600	600	620
Stem lengthmm	75	75	75	90	90
Seatpost lengthmm	300	350	350	350	350

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

Specifications

Frame and fork

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

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 42
Largest chainring: 42
Rear sprockets: 1
Smallest sprocket: 17
Largest sprocket: 17
Lowest gear: 71.7 in
Highest gear: 71.7 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: No shifting

Additional specifications

Bottom bracket standard: BSA
Tire width: 30c
Travel: Front: Additional specification: Not available: Yes
Rear: 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

71.7 gear inches

This value is above the central range for this class.

Cohort: Urban / Fitness Model year: 2019
Sample: 245 bicycles with this information
Coverage: 93.8% of the class

Highest gear

71.7 gear inches

This value is below the central range for this class.

Cohort: Urban / Fitness Model year: 2019
Sample: 245 bicycles with this information
Coverage: 93.8% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 27.4 km/h
Highest gear: 27.4 km/h

Total gear range 100%

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: 71.7–71.7 gear inches
Class reference (p10–p90): 21.8–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Fitness Model year: 2019
Lowest gear: 245 bicycles with this information, 93.8% of the class
Highest gear: 245 bicycles with this information, 93.8% 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 2019 builds

Differences across 2019 builds
Specification	This bicycle Specialized Sirrus Single-Speed – Men's Spec	Specialized Men's Sirrus	Specialized Men's Sirrus Elite Alloy	Specialized Men's Sirrus Elite Carbon	Specialized Men's Sirrus Expert Carbon	Specialized Men's Sirrus Pro Carbon
Frame
Frame material	Aluminum	Aluminum	Aluminum	Carbon	Carbon	Carbon
Fork material	Steel	Steel	Carbon	Carbon	Carbon	Carbon
Drivetrain
Front chainrings	1	3	2	2	2	2
Smallest chainring	42	28	32	32	32	32
Largest chainring	42	48	48	48	48	48
Rear sprockets	1	8	10	10	11	11
Smallest sprocket	17	11	11	11	11	11
Largest sprocket	17	32	34	34	32	32
Lowest gear	71.7 in	25.4 in	27.3 in	27.3 in	29.0 in	29.0 in
Highest gear	71.7 in	126.6 in	126.6 in	126.6 in	126.6 in	126.6 in
Brakes
Brake type	Rim brake	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc
Cockpit
Shifting	No shifting	Mechanical	Mechanical	Mechanical	Mechanical	Mechanical
Other specifications
Bottom bracket standard	BSA	Not informed	BSA	BSA	BSA	BSA
Tire width	30c	32c	30c	30c	30c	30c