Description
Specialized Crux 5 Sport Gravel Bike
The Crux 5 Sport is designed for the purist who demands the speed of the world’s fastest gravel frame paired with the legendary reliability of mechanical shifting. Built upon a FACT 10r carbon frame weighing just 897 grams, this bike inherits the exact geometry and performance characteristics of the elite S-Works models. It provides a lightweight, responsive platform that handles technical dirt sections with the same surgical precision as a Tarmac handles asphalt. By focusing on a power-to-weight ratio that remains highly competitive at 8.94 kilograms, the Sport model ensures that your energy is focused entirely on forward progress, making it an exceptional choice for riders who want a high-performance race bike that is as simple to maintain as it is fast.
Aerodynamic Efficiency and Durable Construction
Achieving the lowest real-world time to finish requires more than just low weight; it requires a bike that can slice through the wind over hours of racing. The Crux 5 Sport utilizes a Rapide stem and an alloy handlebar to create a cockpit that is both aerodynamically efficient and incredibly robust for high-torque efforts. This is complemented by the DT G-500 wheelset, which offers the perfect blend of durability and rolling efficiency required for the unpredictable surfaces found in modern gravel racing. Whether you are navigating deep sand or high-speed fire roads, these components work together to minimise drag and maximise stability, ensuring that your effort is never hindered by your equipment.
Reliable Mechanical Precision and Control
The heart of the Crux 5 Sport is the Shimano GRX 800 mechanical 12-speed drivetrain, a system revered for its tactile feedback and flawless performance in the harshest environments. The ergonomic levers are specifically designed for off-road use, providing secure braking and effortless shifting even when navigating bumpy descents or steep gradients. This mechanical setup offers a wide gear range that allows you to maintain a steady cadence through varied terrain without the need for battery management. When combined with a frame that is validated across real race courses, this bike delivers a dependable and incredibly fast racing experience that empowers you to chase the top step of the podium with total confidence.
Technical Specification
| Frame | Crux 5 FACT 10r Carbon, Rider First Engineered™, Threaded BB, 12x142mm thru-axle, flat-mount disc, UDH dropout |
| Fork | S-Works FACT Carbon, 12x100mm thru-axle, flat-mount disc |
| Tape | Supacaz Super Sticky Kush |
| Stem | Roval Rapide, alloy, 4 bolt, -6 degrees |
| Handlebar | Specialized Adventure Gear, 118.9mm drop x 70mm reach x 12º flare |
| Front Brake | Shimano GRX BR-RX820 |
| Rear Brake | Shimano GRX BR-RX820 |
| Rear Derailleur | Shimano GRX RD-RX822-GS, 12-speed |
| Shift Levers | Shiimano GRX ST-RX820 |
| Cassette | Shimano XT CS-M8100, 12-speed, 10-45t |
| Crankset | Shimano GRX FC-RX820, 40t |
| Bottom Bracket | Shimano Threaded BSA BB |
| Chain | Shimano XT CN-M8100, 12-speed |
| Front Wheel | DT Swiss G500 rim, 26mm internal width, tubeless ready, 24h, Specialized full sealed bearing thru axle hub, centerlock disc, DT Swiss Champion 14G stainless steel spokes, DT Swiss brass nipples |
| Rear Wheel | DT Swiss G500 rim, 26mm internal width, tubeless ready, 24h, Specialized full sealed bearing thru axle hub, centerlock disc, DT Swiss Champion 14G stainless steel spokes, DT Swiss brass nipples |
| Front Tyre | Pathfinder 700x45, Tubeless Ready |
| Rear Tyre | Pathfinder 700x45, Tubeless Ready |
| Inner Tubes | 700x32-50mm, 40mm Presta valve |
| Seat Post | S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset, Lightweight Saddle Clamp |
| Seat Binder | Integrated Wedge |
| Saddle | Body Geometry Power Sport, steel rails |
| Weight | 8.94 kg (Size |
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.
Size Guide
Specialized Crux 5 Sport Gravel Bike Sizing
Delivery & Returns
Reviews
Unable to display Reviews due to Privacy Settings.
Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".
Q&A
Unable to display Q&A due to Privacy Settings.
Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".
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.
Save up to 42% 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.
We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Click here for more info and find out how to claim.