Why buy your bike from Sigma Sports?
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Save up to 47% with any one of our 11 Cycle to Work partners, and get the health benefits of a new bike in exchange for tax free salary sacrifice. To find out more about our various partners and how to apply click here.
Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.
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Specialized Sirrus X 4.0 Disc Hybrid Bike
The Specialized Sirrus X 4.0 Disc is a hardy hybrid bike admirably equipped to tackle anything from fast-paced rides on the tarmac through to adventures across the gravel. The aluminium frame and carbon fork combination promises a light and lively ride, while the Future Shock 1.5 steerer tube damping unit smooths the bumps via its 20mm of plush suspension. The frameset donates a slightly more upright riding position to ensure comfort and control over more technical terrain, and its multiple luggage and mudguard mounts facilitate longer trips and commutes in bad weather.
Strong wheels shod with grippy, high volume tyres give confidence and control off road but roll quickly through the towns, and a SRAM 1x11-speed gear setup is simple to use, affording crisp shifts amongst a wide range of ratios. Powerful hydraulic disc brakes take care of the stopping duties, and an ergonomic saddle and handlebar grips donate extra comfort to the contact points on prolonged rides.
Highlights
- A hardy hybrid bike with a multifaceted performance that’s suited to tarmac and rough gravel
- The aluminium frame and carbon fork form a lightweight and efficient partnership, promoting a lively ride character
- The Future Shock 1.5 steerer tube smooths the bumps via its 20mm of suspension
- A slightly more upright riding position affords extra confidence and control
- Luggage rack and mudguard mounting points facilitate longer trips and combat bad weather
- Strong wheels and high volume tyres handle rutted terrain with aplomb
- A wide-range 1x11-speed SRAM NX gear setup delivers precise shifting
- Hydraulic disc brakes stop powerfully in all conditions
Technical Specification
| Frame | Specialized A1 SL Premium Aluminium, Fitness Geometry, fully manipulated butted tubing, internal cable routing, flat-mount disc, 12x142mm thru-axle, Plug + Play rack/mudguard mounts |
| Fork | Specialized FACT 9r Carbon Monocoque, flat-mount disc, 12x100mm thru-axle, low rider mounts, Plug + Play mudguard mounts, Future Shock 1.5 |
| Bottom Bracket | Threaded BSA 68mm, 24mm spindle |
| Stem | Specialized Future Stem, Comp |
| Handlebar | Specialized Alloy Mini Rise, 9-degree backsweep, 15mm rise, 31.8mm |
| Grips | Specialized Neutralizer, Body Geometry, locking grip |
| Front Brake | Tektro HD-R510, hydraulic disc, 160mm rotor |
| Rear Brake | Tektro HD-R510, hydraulic disc, 160mm rotor |
| Brake Levers | Tektro, hydraulic |
| Rear Derailleur | SRAM NX, 11-speed |
| Shift Levers | SRAM NX, 11-speed |
| Chain | KMC X11, 11-speed with Missing Link™ |
| Cassette | SRAM PG-1130, 11-speed, 11-42t |
| Crankset | Specialized forged aluminium arms, 2-piece, 24mm spindle, Narrow-wide Aluminium chainring, 40t |
| Front Wheel | Rim - Specialized 700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h / Hub - Alloy, Center Lock disc, high-low flange, sealed cartridge bearings, 12x100mm spacing, 32H / Spokes - Stainless, 14g |
| Rear Wheel | Rim - Specialized 700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h / Hub - Alloy, Center Lock disc, high-low flange, sealed cartridge bearings, 12x142mm spacing, 32H / Spokes - Stainless, 14g |
| Front Tyre | Specialized Pathfinder Sport, 700x38mm, clincher |
| Rear Tyre | Specialized Pathfinder Sport, 700x38mm, clincher |
| Saddle | Specialized Bridge Comp, Hollow Cr-mo rails |
| Seatpost | Specialized Alloy, 2-bolt, 14mm offset, 27.2mm |
| Pedals | Specialized Body Geometry Fitness, platform, plastic |
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. For hassle-free home delivery and bike set-up from a qualified mechanic use our Premier Delivery Service.
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. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.
If you require any assistance please contact our Customer Care team.
Specialized Sirrus X 4.0 Disc Hybrid Bike Sizing
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