Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.
We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.
Cyclescheme can save you up to 39% on a bike and accessories. Visit our Cycle to Work Scheme page to learn more and claim.
Specialized Sirrus 4.0 Hybrid Bike
With a lightweight A1 Premium Aluminium frame and FACT 9r Carbon fork, the Sirrus 4.0 Hybrid Bike from Specialized is perfect for anyone wanting a comfortable, efficient bike for commuting, running errands or getting fit. The capacity to take mudguards and a rack further increases the bike’s versatility, and the Tektro hydraulic disc brakes mean that its stopping ability is just as good in the wet as it is in the dry.
Shimano’s 9-speed drivetrain uses a double chainring and 11-34 tooth cassette to provide a wide range of gears, easily operated from the handlebar shifters whilst the Body Geometry saddle and grips provide excellent ergonomic comfort for longer rides.
- A1 Premium Aluminium frame with Fitness Geometry and Plug + Play rack/mudguard mounts
- FACT 9r Carbon fork
- Wide-range Shimano 9-speed gears with double chainrings
- Tektro HD-R280 hydraulic disc brakes
- RoadSport Reflect 700x32c tyres
|Frame||Specialized A1 Premium Aluminium, Fitness Geometry, butted tubing, internal cable routing, 12x142mm thru-axle, Plug + Play rack/mudguard mounts|
|Fork||Specialized FACT carbon, 12x100mm thru-axle, flat-mount disc, Plug + Play mudguard mounts|
|Bottom Bracket||BSA for 24mm spindle|
|Stem||Specialized, 3D-forged alloy, 4-bolt, 7-degree rise|
|Handlebar||Specialized, double-butted alloy, 9-degree backsweep, 31.8m|
|Front Brake||Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 160mm|
|Rear Brake||Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 140mm|
|Brake Levers||Tektro HD-R280, hydraulic disc|
|Front Derailleur||microSHIFT R9, 9-speed, 31.8mm clamp|
|Rear Derailleur||Shimano Sora, 9-speed|
|Shift Levers||microSHIFT, 9-speed|
|Cassette||Shimano Sora, 9-speed, 11-34t|
|Crankset||Specialized 2-piece, forged arms, 24mm spindle, steel chainrings with chainguard, 48/32t|
|Front Wheel||Specialized alloy, loose ball bearings, 12x100mm thru-axle, 28h hub with 700C rim brake, double-wall alloy, 22mm depth, 21mm internal width rim|
|Rear Wheel||Specialized alloy, loose ball bearings, 12x142mm thru-axle, 28h hub with 700C rim brake, double-wall alloy, 22mm depth, 21mm internal width|
|Front Tyre||Specialized RoadSport Reflect, wire bead, Blackbelt/Endurant Casing, 700x32c clincher|
|Rear Tyre||Specialized RoadSport Reflect, wire bead, Blackbelt/Endurant Casing, 700x32c clincher|
|Saddle||Specialized Power, hollow steel rails|
|Seatpost||Specialized Alloy, 12mm offset, 2-bolt clamp, 27.2mm|
|Pedals||Specialized Body Geometry Fitness, platform, plastic pedals|
Built, Checked, Tuned and Tested
All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.
All bikes collected from our shop, are built, tested and ready to ride.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance or contact Customer Care. We do not install accessories to bikes, including mudguards.