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Free UK standard shipping on orders over £50
Experience the pinnacle of gravel cycling with the Colnago G4X Carbon Gravel Bike Shimano GRX 820 2x12, a meticulously engineered machine designed to meet the rigorous demands of competitive gravel racing and adventurous off-road exploration. This complete racing gravel bike exemplifies Colnago’s heritage of excellence, combining cutting-edge carbon monocoque frame technology with the precision and reliability of the Shimano GRX 820 2x12 drivetrain. The frame’s aerodynamic design, inspired by the V-Series used by top-tier WorldTour teams, ensures optimal performance without compromising durability, making it a trusted companion on diverse terrains.
Every detail of the G4X has been thoughtfully optimized to deliver superior handling, responsiveness, and comfort. Its enhanced tyre clearance of up to 45mm accommodates a wide range of tyre sizes, providing exceptional traction and control on gravel, dirt, and mixed surfaces. The bike’s lightweight yet robust construction allows riders to maintain agility and confidence, whether navigating technical courses or embarking on extended gravel rides. With multiple mounting points and compatibility with various groupsets—including electronic options—this bike offers unparalleled customization to suit individual riding preferences and styles.
Complementing its advanced frame, the G4X features versatile cockpit options, including both integrated and standard CC01 carbon setups, allowing riders to tailor their ergonomics for maximum comfort and efficiency. The classic 1.1/8" fork steerer tube ensures broad compatibility with third-party components, further enhancing the bike’s adaptability. The Colnago G4X stands as a testament to the brand’s commitment to innovation and tradition, delivering a gravel bike that excels in both performance and versatility for discerning cyclists.
Is the Colnago G4X compatible with electronic groupsets?
Yes, the G4X frame supports electronic groupsets in both single and double chainring configurations, offering flexibility for riders who prefer modern shifting technology.
What is the maximum tyre width the G4X can accommodate?
The frame allows for tyre clearance up to 45mm, providing ample space for wider tyres that improve grip and comfort on challenging gravel surfaces.
Can I use third-party handlebars and stems with this bike?
Absolutely. The G4X features a standard 1.1/8" fork steerer tube, ensuring compatibility with a wide range of third-party cockpit components for personalized customization.
Does the G4X offer mounting points for bikepacking accessories?
Yes, it includes four riveted mounting points—two on the main triangle, one under the downtube, and one on the top tube—ideal for attaching bottles, bags, or other gear for extended adventures.
How does the G4X differ from its predecessor, the G3-X?
The G4X features increased tyre clearance, refined frame geometry inspired by the V4Rs WorldTour model, and an improved balance of aerodynamics, lightness, and stability, resulting in a more versatile and race-ready gravel bike.
Stock Status Instock - Instore - Item Usually shipped or available for shop collection, within 48 hours (Mon-Fri)
Instock - Supplier Warehouse - Item is held in Suppliers Warehouse, Depending on the the supplier transfer time can vary from 24 Hours to 14 Days for item held in European warehouse.
(over festive periods some suppliers shut from 24th Dec-2nd Jan so orders can be delayed through this period.)
Brands held in European website include Trek, Bontrager, Electra, Wahoo, Rapha. For up-to-date transfer times please call customer services on +44 (0)1782 768622
Most out products are shipped by FedEx, providing unprecedented reliability and speed. Lightweight Spares below £25.00 value have a Royal Mail postage option, which is sent via Tracked 48 service. - £2.99
Shipping on all Domestic Orders over £50.00 (excluding bikes and home trainers) for delivery within the UK is completely FREE!
Bike and Home Trainers and oversize Goods £15.00 - FedEx
White Glove Bike Delivery - our white glove option has your bike personally delivered to you by a fully trained Mechanic and Bike fitter - £99.99
(Certain bikes will only have this option such as Cargo Bikes)
To Qualify for FREE Shipping:
In some cases, we may ship items out with another courier, depending on the status and availability of items ordered. (Customers will not be charged more and will be refunded any unused postage cost) If part of an order is cancelled and the total drops below the £50.00 free postage, a postage charge may be taken.
Delivery costs will be clearly stated on the checkout page, though you will need to register (to provide your delivery address) in order to see the delivery costs.
If you have any questions about delivery charges, times or none delivery please do not hesitate to get in touch by email:store@swinnertoncycles.co.uk or by telephone on +44 (0)1782 768622. Handling is normally 48 hours, but at busy periods this may be extended but we will endeavor to process your order within 5 working days. Please bear in mind in some cases orders can take longer to process, please contact us for more details.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


