Specialized Sirrus 4.0

Name: Specialized Sirrus 4.0
Brand: Specialized

2021 UrbanFitness Manufacturer page

Specialized Sirrus 4.0, color Satin Flake Silver / Charcoal / Black Reflective

Last known price: $1,500

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 9 34–50t / 11–34t
Gear range: 455%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 158–167
SM 165–173
MD 169–180
LG 177–186
XL 183–191
XXL 186–194

Components

10 of 20 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 9r carbon, Fitness Geometry, 12x142mm thru-axle, internal cable routing, flat-mount disc, Plug + Play fender mounts Not identified

Suspension

1 part

Fork
- Specialized

Drivetrain

7 parts

Bottom bracket
- Shimano
Cassette
- Shimano CS-HG400-9 9 speeds 11–34t
CS-HG400
Chain
- KMC X9 9 speeds
Crankset

50/34T Not identified
Front derailleur
- microSHIFT R9
Rear derailleur
- Shimano Sora RD-R3000 9 speeds
RD-R3000
Shifters
- microSHIFT

Brakes

1 part

Brakes
- Tektro HD-R280
HD-R280

Wheels and tires

5 parts

Front hub

Alloy, 6-bolt disc, sealed cartridge bearing, high-low flange, 12x100mm thru-axle, 28h Not identified
Rear hub

Alloy, 6-bolt disc, sealed cartridge bearings, high-low flange, 12x142mm thru-axle, 28h Not identified
Rims

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

Stainless, 14g Not identified
Tires

Front: RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c, Rear: RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c Not identified

Cockpit and contact points

5 parts

Handlebar

Double-butted alloy, 9-degree backsweep, 31.8mm Not identified
Pedals
- Specialized
Saddle

Body Geometry Power Sport, steel rails Not identified
Seatpost

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

Sizes and geometry

6 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 384mm

Stack 631mm

Wheelbase 1060mm

Head angle 71.0°

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 Reported by the manufacturer

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	355	371	384	386	398	410
Stackmm	585	602	631	649	687	709
Top tube lengthmm	532	554	573	580	603	628
Seat tube lengthmm	355	416	453	483	533	563
Head tube lengthmm	125	143	169	186	223	246
Head tube angle	70°	70°	71°	71.5°	72°	72°
Seat tube angle	73.5°	73.5°	73.5°	73.5°	73.5°	73°
Chainstay lengthmm	435	435	435	435	435	435
Wheelbasemm	1027	1050	1060	1063	1082	1101
Front centermm	602	625	635	637	656	675
Bottom bracket dropmm	70	70	70	70	70	70
Bottom bracket heightmm	275	275	275	275	275	275
Standover heightmm	714	756	788	813	849	875
Fork rakemm	51	51	51	51	51	51
Trailmm	71	71	65	62	58	58
Stack/reach ratio	1.65	1.62	1.64	1.68	1.73	1.73
Suspension and parts
Crank lengthmm	170	170	170	175	175	175
Handlebar widthmm	580	580	600	600	620	620
Stem lengthmm	70	70	80	90	100	110
Seatpost lengthmm	300	300	350	350	400	400

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

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: 9
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 29.0 in
Highest gear: 131.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire width: 32c
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

29.0 gear inches

This value is within the central range for this class.

Cohort: Urban / Fitness Model year: 2021
Sample: 245 bicycles with this information
Coverage: 92.1% of the class

Highest gear

131.8 gear inches

This value is above the central range for this class.

Cohort: Urban / Fitness Model year: 2021
Sample: 245 bicycles with this information
Coverage: 92.1% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.1 km/h
Highest gear: 50.5 km/h

Total gear range 455%

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: 29.0–131.8 gear inches
Class reference (p10–p90): 20.6–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Fitness Model year: 2021
Lowest gear: 245 bicycles with this information, 92.1% of the class
Highest gear: 245 bicycles with this information, 92.1% 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 2021 builds
Specification	This bicycle Specialized Sirrus 4.0	Specialized Sirrus 1.0	Specialized Sirrus 2.0	Specialized Sirrus 2.0 Step Through	Specialized Sirrus 3.0	Specialized Sirrus 3.0 Step Through
Frame
Frame material	Carbon	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum
Fork material	Carbon	Steel	Steel	Steel	Carbon	Carbon
Drivetrain
Front chainrings	2	2	2	2	Not informed	2
Smallest chainring	34	30	30	30	Not informed	34
Largest chainring	50	46	46	46	Not informed	50
Rear sprockets	9	7	8	8	9	9
Smallest sprocket	11	12	11	Not informed	11	11
Largest sprocket	34	32	32	Not informed	34	34
Lowest gear	29.0 in	27.2 in	27.2 in	Not informed	Not informed	29.0 in
Highest gear	131.8 in	111.2 in	121.3 in	Not informed	Not informed	131.8 in
Brakes
Brake type	Hydraulic disc	Rim brake	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc