Specialized Sirrus X 4.0

Name: Specialized Sirrus X 4.0
Brand: Specialized

2026 UrbanFitness Manufacturer page

Specialized Sirrus X 4.0, color Satin Dark Navy Metallic / Dolomite Metallic Frost Reflective

Last known price: $1,399

Prices shown first for United States
Fork travel: 20 mm
Wheels: 700c
Drivetrain: 1 × 11 42t / 11–50t
Gear range: 455%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

9 of 19 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 A1SL Premium Aluminum, Fitness Geometry, butted tubing, internal cable routing, flat-mount disc, quick-release, Plug + Play rack/fender mounts Not identified

Suspension

1 part

Fork
- Specialized

Drivetrain

6 parts

Bottom bracket

Threaded BSA 68mm, 24mm spindle Not identified
Cassette
- Shimano CS-LG400-11 11 speeds 11–50t
CS-LG400-11
Chain
- KMC
Crankset
- Prowheel 42t
Rear derailleur
- Shimano Cues
Shifters
- Shimano Cues SL-U6000
SL-U6000

Brakes

1 part

Brakes
- Shimano BR-MT200
BR-MT200

Wheels and tires

5 parts

Front hub

Alloy, sealed cartridge bearings, Center Lock, 12x100mm thru-axle, 24h Not identified
Rear hub

Alloy, Center lock Disc, High-Low Flange, Sealed Cartridge Bearing, 32H, 12mm Axle, 142mm Spacing Not identified
Rims

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

Stainless, 14g Not identified
Tires

Front: Pathfinder Wirebead Fast Gravel 700X40C, Rear: Pathfinder Wirebead Fast Gravel 700X40C Not identified

Cockpit and contact points

5 parts

Handlebar

Alloy Mini Rise, 9-degree backsweep, 15mm rise, 31.8mm Not identified
Pedals
- Specialized
Saddle

Body Geometry Power Sport, steel rails Not identified
Seatpost

Alloy, 2-bolt, 14mm offset, 27.2mm Not identified
Stem
- Ritchey Comp

Sizes and geometry

6 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size SM

Table

Reach 376mm

Stack 606mm

Wheelbase 1033mm

Head angle 70.0°

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 Reach Stack

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	355	371	376	382	386	398
Stackmm	587	590	606	635	651	672
Top tube lengthmm	529	549	559	573	581	599
Seat tube lengthmm	360	395	440	470	510	530
Head tube lengthmm	111	125	143	169	186	208
Head tube angle	69.5°	70°	70°	71°	71°	71°
Seat tube angle	73.5°	73.5°	73.5°	73.5°	73.5°	73.5°
Chainstay lengthmm	440	440	440	440	440	440
Wheelbasemm	1074	1093	1033	1049	1060	1065
Front centermm	602	618	629	634	644	663
Bottom bracket dropmm	70	70	70	70	70	70
Bottom bracket heightmm	284	284	284	284	284	284
Standover heightmm	700	722	750	778	810	831
Fork rakemm	51	51	51	51	51	51
Trailmm	78	75	75	68	68	68
Stack/reach ratio	1.65	1.59	1.61	1.66	1.69	1.69
Suspension and parts
Crank lengthmm	165	165	170	170	175	175
Handlebar widthmm	680	680	680	680	680	680
Stem lengthmm	60	60	70	80	90	100
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: Aluminum
Fork material: Carbon

Suspension

Suspension configuration: Hardtail
Front travel: 20 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 42
Largest chainring: 42
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 24.4 in
Highest gear: 110.7 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: 40c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

24.4 gear inches

This value is within the central range for this class.

Cohort: Urban / Fitness Model year: 2026
Sample: 145 bicycles with this information
Coverage: 78.8% of the class

Highest gear

110.7 gear inches

This value is within the central range for this class.

Cohort: Urban / Fitness Model year: 2026
Sample: 145 bicycles with this information
Coverage: 78.8% of the class

Shifting

Mechanical

5 of 184 bicycles with this information use electronic shifting.

Cohort: Urban / Fitness Model year: 2026
Sample: 184 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.3 km/h
Highest gear: 42.4 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: 24.4–110.7 gear inches
Class reference (p10–p90): 22.1–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Fitness Model year: 2026
Lowest gear: 145 bicycles with this information, 78.8% of the class
Highest gear: 145 bicycles with this information, 78.8% 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 2026 builds
Specification	This bicycle Specialized Sirrus X 4.0	Specialized Sirrus X 1.0	Specialized Sirrus X 1.0 Step-Through	Specialized Sirrus X 2.0	Specialized Sirrus X 2.0 EQ	Specialized Sirrus X 2.0 Step-Through
Frame
Fork material	Carbon	Steel	Steel	Steel	Steel	Steel
Bicycle weight	Not informed	11.71 kg	11.72 kg	Not informed	Not informed	Not informed
Suspension
Suspension configuration	Hardtail	Rigid	Rigid	Rigid	Rigid	Rigid
Front travel	20 mm	Not informed	Not informed	Not informed	Not informed	Not informed
Drivetrain
Front chainrings	1	1	1	1	Not informed	1
Smallest chainring	42	42	42	42	Not informed	42
Largest chainring	42	42	42	42	Not informed	42
Rear sprockets	11	7	7	9	9	9
Smallest sprocket	11	12	12	11	11	11
Largest sprocket	50	40	40	46	46	46
Lowest gear	24.4 in	30.5 in	30.5 in	26.5 in	Not informed	26.5 in
Highest gear	110.7 in	101.5 in	101.5 in	110.7 in	Not informed	110.7 in
Brakes
Brake type	Hydraulic disc	Mechanical disc	Mechanical disc	Hydraulic disc	Hydraulic disc	Hydraulic disc
Other specifications
Bottom bracket standard	BSA	Not informed	Not informed	BSA	Not informed	BSA
Suspension	Hardtail	Rigid	Rigid	Rigid	Rigid	Rigid