Description
Colnago G4X GRX 2x Carbon Gravel Bike
The Colnago G4X GRX 2x Carbon Gravel Bike is the latest gravel racing model from the Cambiago-based brand. Designed to replace the G3-X, it incorporates extensive knowledge from Colnago's successes in cyclocross and road racing. Drawing inspiration from the V-Series bicycles used by the UAE Emirates and UAE ADQ WorldTour Teams, the G4-X stands as a testament to Colnago's off-road expertise.
Colnago's dominance in cyclocross, highlighted by victories from legends such as Sven Nys (six CX World Championships) and Wout Van Aert (two off-road World Championships), shapes the G4-X's design ethos. Sharing the balance and aesthetics of the V4Rs, this bike is finely tuned to meet the demands of gravel racing.
A Perfectly Balanced Gravel Bike
The G4-X focuses on achieving harmony across multiple factors rather than excelling in a single metric like aerodynamics, stiffness, or weight. This balance ensures a bike that is comfortable and responsive, even in challenging conditions, while delivering exceptional performance in lightness, handling, stability, and aerodynamics.
- Tyre clearance has been increased from 40mm to 45mm for enhanced versatility
- Handling and stability are optimised with frame responsiveness tailored for dirt roads and gravel racing
- The lightweight and robust design balances strength with ease of handling for competitive performance
Mounting Points for Adventure
- The frame features four riveted mounting points for practicality
- Two on the main triangle for bottle cages
- One under the downtube
- One on the top tube for additional storage options
The G4-X embodies Colnago's dedication to creating balanced, high-performance bicycles, delivering a gravel bike that combines speed, handling, and enjoyment for riders seeking adventure and competition.
Images for display purposes only, not true to spec.
Technical Specification
| BB | T47 Acros |
| Headset | Acros SS 42 x 52 x 7 mm - 40 x 52 x 7 mm |
| Handlebar | Deda Superzero Gravel Alloy |
| Stem | Colnago RS10 Alloy |
| Bar Tape | Velo VLT-1001-01 |
| Seatpost | Colnago Carbon |
| Saddle | Selle Italia Model X |
| Wheels | Fulcrum Rapid Red 900 Db |
| Tyres | Pirelli Cinturato 700-40C |
| Shifters | Shimano BL-RX820 |
| Caliper Disc Brake | Shimano BR-RX820 |
| Front/Rear Disc Brake | Shimano RT-M800 Ø 160 mm |
| Front Derailleur | Shimano FD-RX820 |
| Rear Derailleur | Shimano RX-822 |
| Cassette | Shimano CS-M810 10-51T |
| Crankset | Shimano FC-RX820-2 48-31T |
| Chain | Shimano CN-M8100 |
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
Colnago G4X GRX 2x Carbon Gravel Bike 2025 Sizing
Delivery & Returns
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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.
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