Specialized Sirrus X 4.0 EQ

Name: Specialized Sirrus X 4.0 EQ
Brand: Specialized

2025 UrbanFitness Manufacturer page

Specialized Sirrus X 4.0 EQ, color Stn Refl Strmgry Char

Price: Not published

Prices shown first for United States
Europe: €1,749 Last known price
Fork travel: 20 mm
Wheels: 700c
Drivetrain: 1 × 12 40t / 11–51t
Gear range: 464%
Weight: 12.57 kg 27.7 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

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

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 A1 SL Premium Aluminum, Fitness Geometry, fully manipulated butted tubing, internal cable routing, flat-mount disc, 12x142mm thru-axle, Plug + Play rack/fender mounts Not identified

Suspension

1 part

Fork
- Specialized

Drivetrain

6 parts

Bottom bracket

Threaded BSA 68mm Not identified
Cassette
- SunRace 11–51t
Chain
- KMC X12 EPT Waxed 12 speeds
Crankset

Forged aluminum arms, 24mm spindle, Narrow-wide steel chainring 40t, chainguard Not identified
Rear derailleur
- Shimano Deore RD-M6100 12 speeds
RD-M6100
Shifters
- Shimano Deore SL-M6100 12 speeds
SL-M6100

Brakes

1 part

Brakes

Hydraulic Disc Not identified

Wheels and tires

3 parts

Rims

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

Stainless, 14g Not identified
Tires

Pathfinder Sport, 700x38 Not identified

Cockpit and contact points

5 parts

Handlebar

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

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

Other components

3 parts

Fenders

DryTech Fender, Front & Rear, Aluminum with Black Finish Not identified
Lights
- Herrmans
Racks
- Tubus

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Geometry diagram unavailable

The drawing needs wheelbase, reach, stack, head tube angle, seat tube angle, head tube length, seat tube length, chainstay length and bottom bracket drop / Bottom bracket height, which the manufacturer did not publish. Available facts remain in the table.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Crank lengthmm	170	170	175	175
Handlebar widthmm	680	680	680	680
Stem lengthmm	80	90	100	110

Not published by the manufacturer: Reach, Stack, Top tube length, Seat tube length, Head tube length, Head tube angle, Seat tube angle, Chainstay length, Wheelbase, Front center, Bottom bracket drop, Bottom bracket height, Standover height, Fork rake, Trail, 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: Carbon
Bicycle weight: 12.57 kg

27.7 lb

Suspension

Suspension configuration: Hardtail
Front travel: 20 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 40
Largest chainring: 40
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 51
Lowest gear: 22.8 in
Highest gear: 105.5 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: 38c
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

22.8 gear inches

This value is below the central range for this class.

Cohort: Urban / Fitness Model year: 2025
Sample: 227 bicycles with this information
Coverage: 81.6% of the class

Highest gear

105.5 gear inches

This value is within the central range for this class.

Cohort: Urban / Fitness Model year: 2025
Sample: 227 bicycles with this information
Coverage: 81.6% of the class

Shifting

Mechanical

13 of 278 bicycles with this information use electronic shifting.

Cohort: Urban / Fitness Model year: 2025
Sample: 278 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.7 km/h
Highest gear: 40.4 km/h

Total gear range 464%

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: 22.8–105.5 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: 2025
Lowest gear: 227 bicycles with this information, 81.6% of the class
Highest gear: 227 bicycles with this information, 81.6% 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 2025 builds
Specification	This bicycle Specialized Sirrus X 4.0 EQ	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	12.57 kg	11.58 kg	11.95 kg	12.08 kg	13.66 kg	12.08 kg
Suspension
Suspension configuration	Hardtail	Rigid	Rigid	Rigid	Rigid	Rigid
Front travel	20 mm	Not informed	Not informed	Not informed	Not informed	Not informed
Drivetrain
Smallest chainring	40	40	40	40	42	40
Largest chainring	40	40	40	40	42	40
Rear sprockets	12	7	7	8	9	8
Smallest sprocket	11	12	12	12	11	12
Largest sprocket	51	40	40	42	41	42
Lowest gear	22.8 in	29.0 in	29.0 in	27.6 in	29.7 in	27.6 in
Highest gear	105.5 in	96.7 in	96.7 in	96.7 in	110.7 in	96.7 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
Tire width	38c	42c	42c	42c	38c	42c

Changes since 2024
Specification	2024 Specialized Sirrus X 4.0 EQ	This bicycle Specialized Sirrus X 4.0 EQ
Frame
Fork material	Not informed	Carbon
Suspension
Suspension configuration	Rigid	Hardtail
Front travel	Not informed	20 mm
Drivetrain
Front chainrings	Not informed	1
Smallest chainring	Not informed	40
Largest chainring	Not informed	40
Lowest gear	Not informed	22.8 in
Highest gear	Not informed	105.5 in
Other specifications
Suspension	Rigid	Hardtail