Specialized Sirrus X 4.0 Bicycle

Specialized Sirrus X 4.0: The Versatile Fitness Bike for Asphalt, Gravel, and Everyday Adventures

The Specialized Sirrus X 4.0 is the perfect fitness bike for those who want a fast, comfortable, and versatile ride, capable of tackling both paved roads and light gravel paths with ease. Thanks to the exclusive Future Shock 1.5 technology, the lightweight A1 Premium aluminum frame, and the FACT carbon fork, it offers a smooth, efficient, and surprisingly comfortable ride.

Designed for those seeking a multi-purpose bike for training, commuting, fitness, and gravel adventures, the Sirrus X 4.0 combines high performance, control, and reliability in every situation.

Why Choose the Specialized Sirrus X 4.0

The Sirrus X 4.0 is designed to ensure the perfect balance of comfort, efficiency, and agility. The slightly upright riding position increases control and reduces fatigue during longer rides, while the 700x40C tires ensure stability and safety on mixed surfaces.

Thanks to the Rider-First Engineered™ philosophy, each frame size is designed to offer the correct level of stiffness, responsiveness, and comfort, ensuring optimal ride quality for any cyclist.

Strengths

• Future Shock 1.5 technology with 20mm travel to absorb vibrations and bumps.
• Lightweight A1SL Premium aluminum frame.
• Specialized FACT 9r monocoque carbon fork.
• Reliable and low-maintenance Shimano CUES 1x11 drivetrain.
• Wide gear range thanks to the 11-50T cassette.
• Shimano hydraulic disc brakes for powerful and modulable braking.
• Pathfinder 700x40C tires ideal for asphalt, white roads, and light gravel.
• Rack and fender mounts.

Ideal For

• Fitness and training.
• Daily city commutes.
• Commuting.
• Light touring.
• White roads and gravel.
• Urban and extra-urban use.
• Long rides on mixed terrains.

Specialized Sirrus X 4.0 Technical Specifications

Frame

Frame

Specialized A1SL Premium Aluminum, Fitness Geometry, butted tubing, internal cable routing, flat-mount disc brake, quick-release, Plug + Play rack and fender mounts.

Suspension

Fork

Specialized FACT 9r Carbon Monocoque, flat-mount disc brake, 12x100mm thru-axle, low rider mounts, Plug + Play fender mounts, Future Shock 1.5 system.

Brakes

Front Brake

Shimano BR-MT200, hydraulic disc brake, 160mm rotor.

Rear Brake

Shimano BR-MT200, hydraulic disc brake, 160mm rotor.

Drivetrain

Shift Levers

Shimano CUES SL-U6000, 11-speed.

Rear Derailleur

Shimano CUES 11-speed with Shadow Plus technology.

Cassette

Shimano CS-LG400-11 CUES, 11-speed, 11-50 tooth range.

Chain

KMC eGlide Shimano CUES 11-speed compatible.

Crankset

Prowheel Alloy:

• XXS - XS: 165mm
• S - M: 170mm
• L - XL: 175mm

Chainring

Narrow Wide Steel 42T.

Bottom Bracket

Threaded BSA 68mm, 24mm axle.

Wheels and Tires

Rims

700C Disc, double-wall alloy, 22mm rim depth, 21mm inner width, 32 holes.

Front Hub

Alloy, sealed cartridge bearings, Center Lock, 12x100mm thru-axle, 24 holes.

Rear Hub

Alloy, Center Lock Disc, High-Low Flange, sealed cartridge bearings, 32 holes, 12mm axle, 142mm spacing.

Spokes

Stainless steel 14g.

Front Tire

Specialized Pathfinder Wirebead Fast Gravel 700x40C.

Rear Tire

Specialized Pathfinder Wirebead Fast Gravel 700x40C.

Inner Tubes

Standard 40mm SV 700x32-50.

Cockpit

Stem

Future Stem Comp.

Handlebars

Alloy Mini Rise, 9° backsweep, 15mm rise, 31.8mm diameter.

Grips

Specialized Neutralizer Body Geometry Locking Grip.

Seatpost

Alloy, two-bolt clamp, 14mm offset, 27.2mm diameter.

Seat Clamp

Bolt-Type, 31.8mm diameter.

Saddle

Saddle

Body Geometry Power Sport with steel rails.

Accessories

Pedals

Specialized Platform.

Product Details

Identifier

222059

Weight

Weight refers to size LG.

Please Note

Technical specifications may change without prior notice based on component availability.
Product images are for illustrative purposes only and may not exactly reflect the described features.

Uncompromising Performance and Comfort

The Specialized Sirrus X 4.0 is the ideal choice for those who want a lightweight, fast, and versatile bicycle, capable of adapting to any path. Thanks to the combination of Future Shock technology, Shimano CUES drivetrain, and mixed-terrain tires, it offers a comfortable, efficient, and fun ride both in the city and off-road.

Do you want to receive your bike ready for use? Don't forget to add the bike assembly service at the time of purchase! Discover all the details here: Francesconi bike assembly

A Complete Guide to Bike Sizes

Foreword: Not all bike sizes are the same

Each type of bike has a specific frame and often uses a different size scale. For example, a road bike with a 54cm frame might be considered a medium size by one brand, but a large by another.

Bicycle adjustment margins

Some types of bikes, like gravel bikes, offer a wide range of adjustments, adapting to different body types. Other models, however, have limitations in this regard. This is an important aspect to consider.

How to use size charts

We've created a simple guide to help you find the right bike size:

1. Check out our size charts for each bike type.
2. Learn more with specific tips to help you make the right choice.

Size Charts: Find Your Perfect Bike

Gravel and road bikes

Sizes are based on the length of the top tube (in cm), which determines the reach of the bike.

For gravel, measurements may vary slightly due to different geometries, but remain similar.

Mountain bike

MTBs are measured in inches, based on the seat tube.

Sizes also vary depending on the type of MTB: full-suspension , hardtail or fat bike .

Children's bikes

The size depends on the size of the wheels, often associated with age:

What to do with half measures?

If you are between two sizes:

• Comfort : Choose the larger size.
• Performance : Go for the smaller size.

Final tips for choosing

1. Consult the manufacturer's instructions : Always check the brand's guidelines.
2. Ask an expert : a specialized workshop can help you choose based on your height, ideal reach and goals.
3. Test the bike : If possible, test the model you intend to purchase.