Sirrus 4.0
$999.99
$1,599.99
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38%
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Ride it Risk-Free for 30 Days!
Every bike comes with our 30-Day Ride Guarantee. Take it home, ride it like you own it. If it’s not right, bring it back within 30 days & we’ll refund your purchase or help you find the right bike.
Normal wear and tear is expected—because the only way to know it’s the right ride is to ride it.
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Specialized Sirrus 4.0 Hybrid Active Bike: Lightweight Speed With Comfort for Everyday Fitness
The Specialized Sirrus 4.0 is designed for riders who want to move fast, ride often, and stay comfortable while doing it. Whether you’re commuting, chasing fitness goals, or logging long pavement miles, the Sirrus 4.0 blends efficiency and comfort in a way that makes it easy to ride more consistently. A lightweight aluminum frame, carbon fork, and dependable components create a bike that feels quick and responsive, yet forgiving enough for real-world roads.
Key Benefits for Riders
Lightweight Frame and Carbon Fork for Efficiency
The A1 SL Premium Aluminum frame keeps weight low while delivering a responsive, lively ride feel that rewards every pedal stroke. Up front, the FACT 9r carbon fork saves significant weight compared to lower-level models and helps smooth out road vibration, making longer rides feel less harsh and more controlled.
Future Shock 1.5 for Reduced Fatigue
Road imperfections add up over time, especially through the hands and wrists. The Sirrus 4.0 includes Future Shock 1.5, which adds compliance at the front of the bike to absorb bumps and chatter. The result is a smoother ride that helps reduce fatigue and keeps you feeling fresher on longer or faster efforts.
Hydraulic Disc Brakes for Confident Control
The Tektro HD-R280 hydraulic disc brakes deliver consistent, predictable stopping power in dry or wet conditions. With a larger front rotor and strong modulation, you get confidence when braking hard in traffic, on descents, or during quick stops on busy rides.
Wide-Range 2x10 Drivetrain for Real-World Riding
A 2x10 MicroSHIFT drivetrain gives the Sirrus 4.0 a versatile gear range that works equally well for fast flats and rolling hills. The 48/32T chainrings paired with an 11–32t cassette make it easy to maintain cadence, whether you’re pushing the pace on open roads or spinning comfortably on longer climbs.
Stable Handling and Everyday Versatility
Front and rear thru-axles improve wheel alignment and handling precision, helping the bike feel stable and predictable at speed. The frame’s rack and fender mounts add everyday versatility, making it easy to set the Sirrus 4.0 up for commuting or fitness-focused utility riding.
Why Choose the Specialized Sirrus 4.0?
If you want a fast, fitness-focused hybrid that doesn’t beat you up on longer rides, the Specialized Sirrus 4.0 is a standout option. It combines lightweight efficiency, smooth carbon comfort, confident hydraulic braking, and a practical gear range to create a bike that’s easy to ride often and hard to outgrow.
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 Fork:
Specialized FACT 9r Carbon Monocoque, flat-mount disc, 12x100mm thru-axle, low rider mounts, Plug + Play fender mounts, Future Shock 1.5 Drivetrain
Front Derailleur:
MicroSHIFT FD-R522, Band-clamp Rear Derailleur:
MicroSHIFT RD-R55S, short cage Cassette:
Sunrace CSRS0, 10-speed, 11-32t Chain:
KMC, X10, EPT anti-corrosion coating, 10-speed w/ Missing Link™ Bottom Bracket:
Praxis M24, BSA Shifters:
MicroSHIFT, 10-speed Wheels
Front Hub:
Alloy, 6-bolt disc, sealed cartridge bearing, high-low flange, 12x100mm thru-axle, 28h Rear Hub:
Alloy, 6-bolt disc, sealed cartridge bearings, high-low flange, 12x142mm thru-axle, 28h Front Tire:
RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c Rear Tire:
RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c Rims:
700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h Cockpit
Handlebars:
Double-butted alloy, 9-degree backsweep, 31.8mm Stem:
Future Stem, Comp Seat Post:
Alloy, 2-bolt, 14mm offset, 27.2mm Saddle:
Body Geometry Power Sport, steel rails Bar Tape:
Specialized Body Geometry Contour, lock-on Brakes
Front Brake:
Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 160mm Rear Brake:
Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 140mm Included Accessories
Pedals:
Specialized Body Geometry Fitness, platform, plastic &fmt=webp)
What We Do:
Full Professional Assembly
Our certified mechanics put together every component—down to the tiniest bolt—ensuring your bike meets the highest standards of safety and performance.
Precise Tuning & Adjustment
Once built, we tune gears, adjust brakes, true the wheels, and dial in every detail to guarantee a smooth, flawless ride from day one.
Careful Repackaging
After your bike passes inspection, we carefully repackage it with easy-to-follow instructions. The result? A simple, stress-free assembly process in the comfort of your home.
Why It Matters:
By taking the time to ensure every aspect of your bike is perfect, we’re giving you more than just a product—we’re offering peace of mind. You’ll hit the road or trail knowing that your bike has been fine-tuned by professionals who care about quality as much as you do.
Processing Time & Shipping:
Since we treat each bike with personalized attention, please allow 2–3 business days for this service before your order ships. If you need expedited processing, simply reach out to us at info@peachtreebikes.com — we’ll do our best to accommodate your timeline.
Choosen Specifically for the Sirrus 4.0
Everything here is specifically chosen to work seamlessly with the Sirrus 4.0. From on bike upgrades to riding gear and home essentials, these picks help you get the absolute most out of every ride from day one.
On Body
The gear you need to complete the ride, curated for the Sirrus 4.0.
For Home
All the things to keep yourSirrus running perfectly.
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