Specialized Sirrus X 4.0 EQ 2025
Bike details
Key information split into simple groups.
Bike summary
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Frame Aluminum
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Travel Front 20mm
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Fork Specialized Future Shock 1.5
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Groupset Deore
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Suspension Hardtail
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Drivetrain 1 × 12
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Brakes Hydraulic Disc
Recommended size guide.
SM
158cm - 171cm
MD
168cm - 180cm
LG
178cm - 189cm
XL
186cm - 199cm
Parts list
Main components, grouped by system.
Bike components
Frame
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
Suspension Fork
Specialized FACT 9r Carbon Monocoque, flat-mount disc, 12x100mm thru-axle, low rider mounts, Plug + Play fender mounts, Future Shock 1.5
Drivetrain
Rear Derailleur
Shimano Deore, M6100, 12pd, Shadow Plus
Shift Levers
Shimano Deore M6100, 12-speed
Cassette
Sunrace CSMZ800, 12-speed, 11-51t
Crank
Forged aluminum arms, 24mm spindle, Narrow-wide steel chainring 40t, chainguard
Bottom Bracket
Threaded BSA 68mm
Chain
KMC X12EPT, 12-speed, anti-corrosion coating w/ reusable Missing Link™
Pedals
Specialized Body Geometry Fitness, Platform, Plastic
Wheels
Rims
700C disc brake, double-wall alloy, 22mm depth, 21mm internal width
Spokes
Stainless, 14g
Tires
Pathfinder Sport, 700x38
Brakes
Brakes
Hydraulic Disc
Cockpit
Stem
Specialized, 3D-forged alloy, 4-bolt, 7-degree rise
Handlebar
Alloy Mini Rise, 9-degree backsweep, 15mm rise, 31.8mm
Seat
Saddle
Power Comp, Hollow Cr-mo rails, 155/143mm
Seatpost
Alloy, 2-bolt, 14mm offset, 27.2mm
Fit data
Numbers for sizing and ride feel.
| Size | SM | MD | LG | XL |
|---|---|---|---|---|
| Wheels | 700 | 700 | 700 | 700 |
| Rider Min Height | 158 cm | 168 cm | 178 cm | 186 cm |
| Rider Max Height | 171 cm | 180 cm | 189 cm | 199 cm |
