Is Specialized Sirrus X 4.0 A Good Choice? – [Specialized Sirrus X 4.0 Review]

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Specialized Sirrus X 4.0 Review

  • Price: $1600
  • Frame: Aluminum
  • Tires: Pathfinder Sport, 700x38mm
  • Gear: 1×11

What we like about it: Currently on sale for just $1279.99, providing excellent value for money.

What we didn’t like about it: Less impressive downhill performance.

Rating: (4.7/5)

Specialized Sirrus X 4.0
Specialized Sirrus X 4.0

The Specialized Sirrus X 4.0 is comfortable, and versatile, and can be your best companion for fitness and commuting. Whether on the road or gravel paths, it conquers them with ease. The revolutionary Future Shock absorbs all the bumps on the road, making your ride incredibly comfortable.

Below, we delve into the riding experience, key features, components, specifications, and other versions of the Specialized Sirrus X 4.0. In the latter part of this article, we’ll also compare it with several other top bicycle models. If you want to explore more bike reviews, stay tuned.

Riding Experience

Fitness Riding

Specialized Sirrus X 4.0

The Specialized Sirrus X 4.0 is my go-to tool for working out, and its features fill me with motivation and enthusiasm.

On the evening streets, I hopped on my Specialized Sirrus X 4.0, ready to embark on a challenging and empowering fitness journey.

I pedaled, and the Specialized Sirrus X 4.0’s start was smooth and solid. I could feel the bike effortlessly responding to the ground under my control. Each pedal stroke is an investment in health and fitness, and I feel that every ride is a care for my body and a commitment. The adjustability of the Specialized Sirrus X 4.0 allows me to tailor resistance and speed to my physical condition, and I tell myself to give it my all.

During the fitness ride, I entered a high-intensity workout phase. I could feel my heartbeat and breath quicken, but I didn’t back down. Every workout is a challenge and breakthrough for me and I tell myself to keep going. The sturdy A1 SL Premium Aluminum frame and the comfortable Bridge Comp saddle of the Specialized Sirrus X 4.0 allow me to focus on exercising without external distractions.

Is that all?

Gradually, I entered a state where I forgot the passage of time. The Specialized Sirrus X 4.0’s maneuverability allowed me to adjust my rhythm and posture. I felt that every pedal rotation was a challenge and a breakthrough for me. Every minute was a training for my body and self-recognition.

Moreover, during high-speed straight rides, I pedaled with Specialized Body Geometry Fitness pedals, continuously accelerating according to my breathing rhythm. The speed was maintained to maximize fitness efficiency without harming the body. I sweated profusely but remained passionate throughout. Every pedal stroke was powerful, and I persisted all the way.

When fatigue set in during the ride, I pressed the Tektro HD-R510 hydraulic disc brakes, stopping the bicycle. I then reached for the water bottle mounted on the bike frame to rehydrate. Soon after, I reached the endpoint, feeling the joy of sweating it out!


The Specialized Sirrus X 4.0 is an excellent fitness bicycle. It features a Specialized A1 SL Premium Aluminum frame, which is exceptionally lightweight. Moreover, its frame, geometry, and saddle are scientifically tested and ergonomically designed. The handlebars and pedals provide a very comfortable riding experience. Whether on the road or gravel paths, this bicycle adapts exceptionally well.

Additionally, it boasts the outstanding SRAM NX rear derailleur, ensuring smooth and remarkable shifting performance. Its Tektro HD-R510 hydraulic disc brakes deliver excellent stopping power, ensuring the rider’s safety. Its Pathfinder Sport tires offer excellent visibility, low rolling resistance, and great traction, making your ride simpler and more comfortable.


Other Versions

After extensive testing, we’ve gained a deeper understanding of this bicycle. It’s a good choice.

However, many riders have specific performance or component requirements. Therefore, we conducted further research by exploring similar bicycles.

Specialized Sirrus X 3.0

Specialized Sirrus X 3.0

Both the Specialized Sirrus X 4.0 and Sirrus X 3.0 feature aluminum frames and 700c aluminum wheels. But the Sirrus X 4.0 is equipped with a Specialized Future Shock 1.5 fork, while the Sirrus X 3.0 has an aluminum fork. A carbon fork is lightweight, flexible, and offers excellent shock absorption but comes at a higher price. The aluminum fork of the Sirrus X 3.0 is more affordable but lacks rigidity. Furthermore, the Sirrus X 3.0 is a rigid suspension bike without front travel, while the Sirrus X 4.0 is a hardtail bike with 20mm of front travel, providing good shock absorption.

Additionally, the stack/reach ratio of the Sirrus X 4.0 is larger, providing a smoother ride for the rider. However, both have the same head tube angle and BB drop. Nevertheless, the trail of the Sirrus X 3.0 is greater than that of the 4.0. A larger trail offers higher speed stability and a tendency for self-correction in steering, while a smaller trail provides faster and more agile steering.

What do we like about it?

  • Currently on sale for just $1279.99, providing excellent value for money.
  • Future Shock 1.5 offers 20mm of travel, providing good shock absorption.
  • Suitable for both road and gravel riding.
  • Can accommodate fenders and racks, making it ideal for rainy-day rides and carrying a lot of gear.

What don’t we like about it?

  • Less impressive downhill performance.


  • Is this bike suitable for beginners?

It is suitable for both beginners and experienced riders.

  • Does this bike have Future Shock?

This bike comes equipped with Future Shock 1.5, using a new spring for enhanced performance and control.

  • Can this bike handle gravel roads?

It provides a smooth riding experience on gravel roads.

  • How do I choose the right size?

The size chart is below:

These sizes are general guidelines, and the best way to find your size is to test ride the bike.

Rider heightSIZE
4’8″ – 4’11”XXS
4’11” – 5’2″XS
5’1″ – 5’5″S
5’5″ – 5’9″M
5’9″ – 6’0″L
6’0″ – 6’4″XL
6’4″ – 6’6″XXL



FrameSpecialized A1 SL Premium Aluminum, Fitness Geometry, fully manipulated butted tubing, internal cable routing, flat-mount disc, 12x142mm thru-axle, Plug + Play rack/fender mountsBB Standard: BSA, 68mm, ThreadedColors: Gloss Smoke / Cool Grey / Satin Black Reflective; Gloss Lagoon Blue / Tropical Teal / Satin Black Reflective; White Mountains / Taupe / Satin Black Reflective
ForkSpecialized FACT 9r Carbon Monocoque, flat-mount disc, 12x100mm thru-axle, low rider mounts, Plug + Play fender mounts, Future Shock 1.5
Bottom BracketThreaded BSA 68mm, 24mm spindle
StemFuture Stem, Comp
HandlebarAlloy Mini Rise, 9-degree backsweep, 15mm rise, 31.8mm
SaddleBridge Comp, Hollow Cr-mo rails, 155/143mm
SeatpostAlloy, 2-bolt, 14mm offset, 27.2mm
PedalsSpecialized Body Geometry Fitness, platform, plastic


Rear DerailleurSRAM NX, 11-speed
CrankForged aluminum arms, 2-piece, 24mm spindle, Narrow-wide aluminum chainring, 40T
ShiftersSRAM NX, 11-speed
CassetteSRAM PG-1130, 11-speed, 11-42t
ChainKMC X11, 11-speed w/ Missing Link™
BrakesTektro HD-R510, hydraulic disc, 160mm


Rims700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h
SpokesStainless, 14g
Front HubAlloy, Center Lock disc, high-low flange, sealed cartridge bearings, 12x100mm spacing, 24H
Rear HubAlloy, Center Lock disc, high-low flange, sealed cartridge bearings, 12x142mm spacing, 28H
TiresFront: Pathfinder Sport, 700x38mm, Rear: Pathfinder Sport, 700x38mm

Comparison Table

BikesClick viewTiresDrivetrainFrame MaterialGroupset
Cannondale Quick CX Women’s 3Click ViewVittoria Terreno Dry, 700x40c2×8AluminumShimano Acera, Tourney
Canyon Pathlite 6 WMNClick ViewSchwalbe G-One Bite 45mm1 x 12AluminumShimano XT, Deore
Rose MULTISPORT 3 Fitness MenClick ViewMaxxis 700x40C2 x 11AluminumShimano XT,SLX

Specialized Sirrus X 4.0 vs. Cannondale Quick CX Women’s 3

Cannondale Quick CX Women's 3
Cannondale Quick CX Women’s 3

The Specialized Sirrus X 4.0 features a 1×11 drivetrain, whereas the Cannondale Quick CX Women’s 3 has a 2×8 drivetrain. The 1×11 drivetrain offers a wide gear range and smooth shifting, with the single front chainring design effectively preventing chain drops. Both of these bikes are hardtail bicycles, with the Specialized Sirrus X 4.0 having 20mm of front travel, while the Cannondale Quick CX Women’s 3 has 63mm of front travel. The 63mm front travel provides better shock absorption, making the rider’s journey more comfortable.

The Cannondale Quick CX Women’s 3 can reach speeds of up to 36mph, slightly faster than the Specialized Sirrus X 4.0’s speed of 31mph. However, the Cannondale Quick CX Women’s 3 has 40c tires, which are slightly wider than the 38mm tires on the Specialized Sirrus X 4.0. Wider tires can adapt to a variety of road surfaces and offer better stability.

Learn More: Is Cannondale Quick CX 3 Worth Buying? [2022 Cannondale Quick CX 3 Review]

Specialized Sirrus X 4.0 vs. Canyon Pathlite 6 WMN

Canyon Pathlite 6 WMN
Canyon Pathlite 6 WMN

The Canyon Pathlite 6 WMN comes in two wheel sizes, namely 650b and 700c, offering riders more choices. Additionally, its 1×12 drivetrain provides a wider gear range and smoother shifting. Moreover, its 75mm front travel offers better shock absorption. However, their speeds are consistent, both capable of reaching 31 mph.

The Specialized Sirrus has a more gradual geometry with a 1.66 stack/reach ratio. The Canyon Pathlite 6 WMN has a relatively milder geometry, but compared to the Specialized Sirrus X 4.0’s geometry, it’s a bit more aggressive. For fitness bicycles, a more gradual geometry can help riders avoid strain during workouts. It’s worth noting that the latter provides Ergon GA3 grips, while the former comes with Specialized Body Geometry Fitness pedals, both of which perform well.

Specialized Sirrus X 4.0 vs. Rose MULTISPORT 3 Fitness Men

Rose MULTISPORT 3 Fitness Men
Rose MULTISPORT 3 Fitness Men

The Rose MULTISPORT 3 Fitness Men has a stack/reach ratio of 1.65, which is slightly smaller than the 1.66 stack/reach ratio of the Specialized Sirrus X 4.0. Additionally, the head tube angle of the Specialized Sirrus X 4.0 is 70.5°, which is also slightly smaller. A smaller stack/reach ratio tends to be more aggressive, while a smaller head tube angle contributes to a smoother ride. However, it comes with a 2×11 drivetrain, offering excellent shifting performance, although there’s a possibility of chain drops during riding.

Furthermore, the Specialized Sirrus X 4.0 has a 70mm BB drop, which is larger than the 60mm BB drop of the Rose MULTISPORT 3 Fitness Men. A larger BB drop lowers the rider’s center of gravity, enhancing stability. However, a larger BB drop means that the pedal position is lower, which can pose challenges during cornering and navigating obstacles. Moreover, the Rose MULTISPORT 3 Fitness Men features wider 40c tires, providing a smoother ride.


This is our review of the Specialized Sirrus X 4.0. It is an outstanding fitness bike that can assist riders in their exercise routines. Considering these factors, we’ve awarded it a high score of 4.7. If you’re interested in more bicycle information, please take a look at our other reviews.

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