Sirrus 4.0
$999.99$1,599.99
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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: Fitness, Fun, and Performance in One Ride
The Specialized Sirrus 4.0 is designed to keep up with your fast-paced lifestyle, whether you're commuting to work, running errands, or pushing yourself toward your fitness goals. This bike brings together comfort, performance, and durability, making it the perfect companion for your busy routine. With a lightweight frame, reliable components, and ergonomic features, the Sirrus 4.0 ensures that every ride is smooth, efficient, and enjoyable.
Key Benefits for Riders
Lightweight Design for a Faster, Easier Ride
Built with a carbon fiber fork and a premium A1 alloy frame, the Sirrus 4.0 offers a lightweight, responsive ride. The carbon fork reduces weight significantly, saving nearly 3 pounds compared to the Sirrus 2.0 model. This means less weight to carry on your daily rides, allowing for quicker acceleration, better handling, and easier climbing. Whether you're navigating through traffic or tackling your local park paths, the Sirrus 4.0 makes every ride feel effortless.
Comfort and Control for Longer Rides
The Sirrus 4.0 features ergonomically designed Body Geometry touchpoints, including the saddle and grips, which reduce pressure on key areas, ensuring you stay comfortable even on longer rides. The inclusion of the Future Shock 1.5 system offers 20mm of axial compliance, helping to smooth out the ride over rough roads and bumps. This combination of comfort and performance ensures that you can ride longer without discomfort, making it perfect for those pushing toward fitness goals or exploring new routes.
Precise Shifting for All Your Adventures
The wide-range 2x10 MicroSHIFT drivetrain gives you precise and intuitive shifting, allowing you to tackle varying terrain with ease. Whether you're cruising on flat roads or powering through uphill climbs, the Sirrus 4.0 provides smooth transitions between gears, helping you maintain a consistent cadence and optimize your power output. This drivetrain is built to withstand the demands of daily riding, ensuring durability and long-lasting performance.
Powerful Stopping Power in Any Condition
Equipped with Tektro HD-R280 hydraulic disc brakes, the Sirrus 4.0 provides reliable stopping power, whether you're riding in wet, dry, or hilly conditions. The 160mm front and 140mm rear rotors offer exceptional modulation and control, ensuring that you can stop confidently even at high speeds or on slippery surfaces. With these brakes, you can ride with peace of mind knowing you’ll have dependable stopping power in any weather.
Durability That Keeps Up with Your Daily Ride
Crafted from durable A1 SL premium aluminum, the Sirrus 4.0 features fully manipulated butted tubing for strength and longevity. The internal cable routing not only improves aesthetics but also reduces the chances of wear and tear over time. Additionally, the frame comes equipped with Plug + Play mounts for racks and fenders, making it versatile enough to handle commuting, touring, or everyday errands without skipping a beat.
Why Choose the Specialized Sirrus 4.0?
The Sirrus 4.0 is perfect for riders looking to blend performance with comfort. It’s ideal for commuting, fitness rides, or casual weekend cruises. The lightweight frame, precise shifting, and advanced braking system combine to create a ride that’s both enjoyable and efficient. Whether you're aiming for a personal best on your fitness journey or just need a reliable bike to get you from point A to point B, the Sirrus 4.0 is the bike that can handle it all.
Choose the Specialized Sirrus 4.0 and experience the perfect balance of speed, comfort, and control—your ideal ride for every day.
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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 Shifters:
MicroSHIFT, 10-speed Front Derailleur:
MicroSHIFT FD-R522, Band-clamp Rear Derailleur:
MicroSHIFT RD-R55S, short cage Bottom Bracket:
Praxis M24, BSA Cassette:
Sunrace CSRS0, 10-speed, 11-32t Chain:
KMC, X10, EPT anti-corrosion coating, 10-speed w/ Missing Link™ Front Brake:
Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 160mm Rear Brake:
Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 140mm 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 Rims:
700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h Front Tire:
RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c Rear Tire:
RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c 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 Pedals:
Specialized Body Geometry Fitness, platform, plastic -
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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.