Specialized Sirrus Expert Carbon Disc

2015 UrbanFitness Manufacturer page

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

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

Components

13 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 Sirrus FACT 9r carbon, Fitness Geometry, Zertz, 1-1/8"" headtube Not identified

Suspension

1 part

Fork
- Specialized

Drivetrain

6 parts

Brakes

1 part

Brakes
- Magura

Wheels and tires

2 parts

Rims

Front: AXIS 2.0 Disc, Rear: AXIS 2.0 Disc Not identified
Tires
- Specialized

Cockpit and contact points

6 parts

Handlebar
- Specialized
Headset

1-1/8"" Campy style, integrated cartridge Not identified
Pedals

Sirrus, 1.5mm Varus angle, nylon body, symmetric alloy cage, low profile bearing system, toe clip capable Not identified
Saddle
- Ritchey Comp
Seatpost
- Specialized
Stem
- Specialized

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 403mm

Stack 591mm

Wheelbase 1060mm

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 Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	395	403	410	420
Stackmm	574	591	616	650
Top tube lengthmm	570	580	600	620
Seat tube lengthmm	440	485	530	570
Head tube lengthmm	150	165	190	225
Head tube angle	71°	71.5°	72°	72°
Seat tube angle	73.25°	73.5°	73°	73°
Chainstay lengthmm	435	435	435	435
Wheelbasemm	1051	1060	1070	1091
Front centermm	627	635	645	666
Bottom bracket dropmm	70	70	70	70
Standover heightmm	752	785	822	861
Fork rakemm	51	51	51	51
Trailmm	63	60	57	57
Stack/reach ratio	1.45	1.47	1.50	1.55
Suspension and parts
Crank lengthmm	170	173	173	175
Handlebar widthmm	580	600	600	620
Stem lengthmm	90	90	105	105

Not published by the manufacturer: Bottom bracket height, Front travel, Rear travel, Stem angle, Seatpost length 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: 11
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: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 30c
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 within the central range for this class.

Cohort: Urban / Fitness Model year: 2015
Sample: 95 bicycles with this information
Coverage: 87.1% of the class

Highest gear

131.8 gear inches

This value is above the central range for this class.

Cohort: Urban / Fitness Model year: 2015
Sample: 95 bicycles with this information
Coverage: 87.1% 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): 22.2–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Fitness Model year: 2015
Lowest gear: 95 bicycles with this information, 87.1% of the class
Highest gear: 95 bicycles with this information, 87.1% 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 2015 builds

Differences across 2015 builds
Specification	This bicycle Specialized Sirrus Expert Carbon Disc	Specialized Sirrus	Specialized Sirrus Comp	Specialized Sirrus Comp Carbon Disc	Specialized Sirrus Comp Disc	Specialized Sirrus Elite
Frame
Frame material	Carbon	Aluminum	Aluminum	Carbon	Aluminum	Aluminum
Fork material	Carbon	Steel	Carbon	Carbon	Carbon	Carbon
Drivetrain
Front chainrings	2	Not informed	2	2	2	2
Smallest chainring	34	Not informed	34	34	34	26
Largest chainring	50	Not informed	48	50	50	48
Rear sprockets	11	8	10	10	10	9
Smallest sprocket	11	11	11	12	12	11
Largest sprocket	32	32	36	30	30	32
Lowest gear	30.8 in	Not informed	27.4 in	32.9 in	32.9 in	23.6 in
Highest gear	131.8 in	Not informed	126.6 in	120.8 in	120.8 in	126.6 in
Brakes
Brake type	Hydraulic disc	Rim brake	Rim brake	Hydraulic disc	Hydraulic disc	Rim brake
Other specifications
Tire width	30c	32c	30c	30c	30c	30c
Travel	Configuration: Rigid	Configuration: RigidFront: Additional specification: Not available: Yes	Configuration: Rigid	Configuration: Rigid	Configuration: Rigid	Configuration: Rigid