The Specialized Sirrus X 4.0 is the ideal companion for anyone who wants to move fast in the city, explore gravel roads, and tackle mixed terrain without giving up comfort. Designed for riders who enjoy cycling everywhere, it combines the efficiency of a fitness bike with the security and stability of a lightweight gravel bike. The A1 alloy frame with carbon fork and the slightly upright riding position allow you to cover long distances with ease, while the wide-section tires and 1x drivetrain give you constant control on both asphalt and off-road terrain. Thanks to Rider-First Engineered technology, every size of the Sirrus X 4.0 is optimized to deliver the right balance of stiffness, weight, and responsiveness, so the bike reacts precisely and naturally to your input. Its agility is its strongest point: the feeling is one of almost “telepathic” handling, encouraging you to go further and further beyond your usual commute, discovering new roads and routes.
SPECIALIZED SIRRUS X 4.0 KEY FEATURES:
- Future Shock 1.5 system with 20 mm of travel for increased comfort and control on gravel and rough surfaces
- Lightweight A1 alloy frame with carbon fork for an ideal balance of weight, efficiency, and durability
- Wide-profile tires for improved stability, grip, and safety on both asphalt and off-road terrain
- Slightly upright riding position for greater comfort and control on daily commutes and longer rides
- SRAM NX 1x11 drivetrain with a wide gear range, precise and reliable in all conditions
- Rider-First Engineered concept: each frame size is optimized for the best balance of stiffness, weight, and responsiveness
- Agile and responsive handling designed for intuitive control on mixed terrain
Technical specifications
Frame
- Specialized A1SL Premium Aluminum
- Fitness geometry, hydroformed tubing
- Internal cable routing
- Flat-mount disc brake mounts
- Plug + Play mounts for racks and fenders
- Quick release
Fork / Suspension
- Fork: Specialized FACT 9r Carbon Monocoque
- Flat-mount disc
- 12x100 mm thru-axle
- Low rider mounts
- Plug + Play fender mounts
- Future Shock 1.5
Brakes
- Front: Shimano BR-MT200, hydraulic disc, 160 mm
- Rear: Shimano BR-MT200, hydraulic disc, 160 mm
Drivetrain
- Shifters: Shimano Cues SL-U6000, 11-speed
- Rear derailleur: Shimano Cues 11-speed Shadow Plus
- Cassette: Shimano CS-LG400-11, 11-50T
- Crankset: Prowheel Alloy (165 / 170 / 175 mm depending on size)
- Chainring: Narrow Wide steel 42T
- Bottom bracket: BSA 68 mm, 24 mm spindle
- Chain: KMC eGlide for Shimano Cues 11-speed
Wheels & Tires
- Rims: 700C disc, double wall, 22 mm depth, 21 mm internal width, 32h
- Front hub: 12x100 mm, Center Lock, 24h
- Rear hub: 12x142 mm, Center Lock, 32h
- Spokes: stainless steel 14g
- Tires: Pathfinder Wirebead Fast Gravel 700x40C (front and rear)
- Tubes: Standard 700x32–50 SV
Cockpit
- Handlebar: Alloy Mini Rise, 9° backsweep, 15 mm rise, 31.8 mm
- Stem: Future Stem Comp
- Grips: Specialized Neutralizer Body Geometry locking grips
- Seatpost: Alloy 27.2 mm, 14 mm offset, 2-bolt
- Seat clamp: 31.8 mm bolt type
- Saddle: Body Geometry Power Sport, steel rails
Accessories
- Pedals: Specialized platform pedals
Weight
- Measured size: LG
Bike geometry
| Parameter | Size 1 | Size 2 | Size 3 | Size 4 | Size 5 | Size 6 |
|---|---|---|---|---|---|---|
| Crank length | 165 | 165 | 170 | 170 | 175 | 175 |
| Handlebar width | 680 | 680 | 680 | 680 | 680 | 680 |
| Stem length | 60 | 60 | 70 | 80 | 90 | 100 |
| Saddle width | 155 | 155 | 155 | 143 | 143 | 143 |
| Seatpost length | 300 | 300 | 350 | 350 | 400 | 400 |
| Stack | 587 | 590 | 606 | 635 | 651 | 672 |
| Reach | 355 | 371 | 376 | 382 | 386 | 398 |
| Head tube length | 111 | 125 | 143 | 169 | 186 | 208 |
| Head tube angle | 69.5 | 70 | 70 | 71 | 71 | 71 |
| Bottom bracket height | 284 | 284 | 284 | 284 | 284 | 284 |
| Bottom bracket drop | 70 | 70 | 70 | 70 | 70 | 70 |
| Trail | 78 | 75 | 75 | 68 | 68 | 68 |
| Fork length (full) | 395 | 395 | 395 | 395 | 395 | 395 |
| Fork rake/offset | 51 | 51 | 51 | 51 | 51 | 51 |
| Front center | 602 | 618 | 629 | 634 | 644 | 663 |
| Chainstay length | 440 | 440 | 440 | 440 | 440 | 440 |
| Wheelbase | 1074 | 1093 | 1033 | 1049 | 1060 | 1065 |
| Top tube length (horizontal) | 529 | 549 | 559 | 573 | 581 | 599 |
| Standover height | 700 | 722 | 750 | 778 | 810 | 831 |
| Seat tube length | 360 | 395 | 440 | 470 | 510 | 530 |
| Seat tube angle | 73.5 | 73.5 | 73.5 | 73.5 | 73.5 | 73.5 |
The Specialized Sirrus X 4.0 is the ideal companion for anyone who wants to move fast in the city, explore gravel roads, and tackle mixed terrain without giving up comfort. Designed for riders who enjoy cycling everywhere, it combines the efficiency of a fitness bike with the security and stability of a lightweight gravel bike. The A1 alloy frame with carbon fork and the slightly upright riding position allow you to cover long distances with ease, while the wide-section tires and 1x drivetrain give you constant control on both asphalt and off-road terrain. Thanks to Rider-First Engineered technology, every size of the Sirrus X 4.0 is optimized to deliver the right balance of stiffness, weight, and responsiveness, so the bike reacts precisely and naturally to your input. Its agility is its strongest point: the feeling is one of almost “telepathic” handling, encouraging you to go further and further beyond your usual commute, discovering new roads and routes.
SPECIALIZED SIRRUS X 4.0 KEY FEATURES:
- Future Shock 1.5 system with 20 mm of travel for increased comfort and control on gravel and rough surfaces
- Lightweight A1 alloy frame with carbon fork for an ideal balance of weight, efficiency, and durability
- Wide-profile tires for improved stability, grip, and safety on both asphalt and off-road terrain
- Slightly upright riding position for greater comfort and control on daily commutes and longer rides
- SRAM NX 1x11 drivetrain with a wide gear range, precise and reliable in all conditions
- Rider-First Engineered concept: each frame size is optimized for the best balance of stiffness, weight, and responsiveness
- Agile and responsive handling designed for intuitive control on mixed terrain
Technical specifications
Frame
- Specialized A1SL Premium Aluminum
- Fitness geometry, hydroformed tubing
- Internal cable routing
- Flat-mount disc brake mounts
- Plug + Play mounts for racks and fenders
- Quick release
Fork / Suspension
- Fork: Specialized FACT 9r Carbon Monocoque
- Flat-mount disc
- 12x100 mm thru-axle
- Low rider mounts
- Plug + Play fender mounts
- Future Shock 1.5
Brakes
- Front: Shimano BR-MT200, hydraulic disc, 160 mm
- Rear: Shimano BR-MT200, hydraulic disc, 160 mm
Drivetrain
- Shifters: Shimano Cues SL-U6000, 11-speed
- Rear derailleur: Shimano Cues 11-speed Shadow Plus
- Cassette: Shimano CS-LG400-11, 11-50T
- Crankset: Prowheel Alloy (165 / 170 / 175 mm depending on size)
- Chainring: Narrow Wide steel 42T
- Bottom bracket: BSA 68 mm, 24 mm spindle
- Chain: KMC eGlide for Shimano Cues 11-speed
Wheels & Tires
- Rims: 700C disc, double wall, 22 mm depth, 21 mm internal width, 32h
- Front hub: 12x100 mm, Center Lock, 24h
- Rear hub: 12x142 mm, Center Lock, 32h
- Spokes: stainless steel 14g
- Tires: Pathfinder Wirebead Fast Gravel 700x40C (front and rear)
- Tubes: Standard 700x32–50 SV
Cockpit
- Handlebar: Alloy Mini Rise, 9° backsweep, 15 mm rise, 31.8 mm
- Stem: Future Stem Comp
- Grips: Specialized Neutralizer Body Geometry locking grips
- Seatpost: Alloy 27.2 mm, 14 mm offset, 2-bolt
- Seat clamp: 31.8 mm bolt type
- Saddle: Body Geometry Power Sport, steel rails
Accessories
- Pedals: Specialized platform pedals
Weight
- Measured size: LG
Bike geometry
| Parameter | Size 1 | Size 2 | Size 3 | Size 4 | Size 5 | Size 6 |
|---|---|---|---|---|---|---|
| Crank length | 165 | 165 | 170 | 170 | 175 | 175 |
| Handlebar width | 680 | 680 | 680 | 680 | 680 | 680 |
| Stem length | 60 | 60 | 70 | 80 | 90 | 100 |
| Saddle width | 155 | 155 | 155 | 143 | 143 | 143 |
| Seatpost length | 300 | 300 | 350 | 350 | 400 | 400 |
| Stack | 587 | 590 | 606 | 635 | 651 | 672 |
| Reach | 355 | 371 | 376 | 382 | 386 | 398 |
| Head tube length | 111 | 125 | 143 | 169 | 186 | 208 |
| Head tube angle | 69.5 | 70 | 70 | 71 | 71 | 71 |
| Bottom bracket height | 284 | 284 | 284 | 284 | 284 | 284 |
| Bottom bracket drop | 70 | 70 | 70 | 70 | 70 | 70 |
| Trail | 78 | 75 | 75 | 68 | 68 | 68 |
| Fork length (full) | 395 | 395 | 395 | 395 | 395 | 395 |
| Fork rake/offset | 51 | 51 | 51 | 51 | 51 | 51 |
| Front center | 602 | 618 | 629 | 634 | 644 | 663 |
| Chainstay length | 440 | 440 | 440 | 440 | 440 | 440 |
| Wheelbase | 1074 | 1093 | 1033 | 1049 | 1060 | 1065 |
| Top tube length (horizontal) | 529 | 549 | 559 | 573 | 581 | 599 |
| Standover height | 700 | 722 | 750 | 778 | 810 | 831 |
| Seat tube length | 360 | 395 | 440 | 470 | 510 | 530 |
| Seat tube angle | 73.5 | 73.5 | 73.5 | 73.5 | 73.5 | 73.5 |
Buy safely
La connexion et les transactions sont toujours sécurisées.
Free Shipping
With DHL or GLS courier for orders over 49 euros
Do you need help?
Whatsapp: 3341036415
Mon / Fri: from 10 to 19