Colnago G4-X Shimano GRX 820 2x Bicycle - Yellow

The Colnago G4-X Shimano GRX 820 2x represents excellence in the world of gravel bikes. With a perfect balance of lightness, maneuverability, and stability, this bike is designed to excel on all types of terrain, from dirt roads to the most challenging surfaces. Thanks to its optimized geometry, carbon frame, and Shimano GRX 2x groupset, the G4-X offers you an unparalleled riding experience, perfect for both racing and leisurely outings.

Perfect Gravel Bicycle for Every Terrain

The Colnago G4-X Shimano GRX 820 2x is a bicycle designed for those seeking superior performance in gravel races or outings on unpaved roads. Thanks to its carbon frame, Shimano GRX 2x drivetrain, and high-quality components, it offers incredible responsiveness and stability. Whether you're tackling steep climbs or technical descents, the G4-X ensures maximum control and comfort.

Technical Specifications

Frame Kit

• Frame: Monocoque carbon, designed to ensure a lightweight yet sturdy bike, capable of tackling even the most challenging terrains.

• Forcella: Carbon for disc brakes, with external cable routing and a round section, ensuring a smooth ride and better shock management.

• Steering Series: ACROS ss 42x52x7mm - 40x52x7mm, which ensures precision in the directionality of the bicycle.

• Seatpost: Carbon, with a 0.15 offset and "D-Shape" section, which improves pedaling efficiency and comfort.

• Perni Passanti: Diameter 12 mm, length 100 mm (front) and 142 mm (rear), to ensure a secure and stable installation.

Transmission

• Shift: Shimano GRX 820 2x, with a wide range of gears to tackle every type of slope and terrain.

• Front Derailleur: Shimano GRX 2x, model FD-RX820, for precise and quick shifting.

• Rear Derailleur: Shimano GRX 2x, model RD-RX820, to ensure maximum efficiency in transmission.

• Chain: Shimano GRX, model CN-M8100 12V, for a smooth and durable ride.

• Crankset: Shimano GRX 2x, with a ratio of 48-31T, which offers a good combination of power and lightness.

• Pacco Pignoni: Shimano GRX 2x, 11-36 12V, for a wide range of gears suitable for every situation.

• Central Movement: Shimano SM-BB72-41B Press Fit Movement 86.5x41, which ensures greater durability and resistance.

• Crank Length:

  • Sizes 450–480: 170 mm

  • Sizes 520–540: 172.5 mm

  • Size 570: 175 mm

Brakes

• Brakes: Shimano RX-820, with 160 mm front and rear discs (RT-MT800-S), for powerful and safe braking on all terrains.

• Brake Lever: Shimano ST-RX820, designed for a comfortable grip and optimal braking control.

• Brake Caliper: Shimano RX-820, for superior braking performance even in the most difficult conditions.

Wheels

• Wheels: Fulcrum Rapid Red 900 DB, 2-Way Fit Ready, made of aluminum, compatible with both traditional and tubeless tires, for maximum versatility and durability.

• Raggi: Stainless steel, for long-lasting durability and excellent performance.

• Rim Height: 24 mm (front and rear), for greater stability on descents and rough terrain.

• Internal Channel Width: 22 mm, for better compatibility with gravel tires.

• Mozzi: Aluminum with sealed cartridge bearings, to reduce friction and increase durability over time.

• Perni Passanti: HH12-100 (front) and HH12-142 (rear), for greater safety and rigidity.

• Tires: Pirelli Cinturato Gravel 40 TLR, ideal for gravel and for excellent traction on mixed terrain.

• Maximum Tire Size: 42 mm, for greater stability and comfort on rough terrain.

Components

• Saddle:

  • "Prologue" Kappa BK

  • "Selle Italia" Model X BB FEC

• Handlebar: Deda Gravel 100

  • Size 46s: Width 400 mm

  • Sizes 49s - 55s: Width 420 mm

  • Size 58s: Width 440 mm

• Handlebar Attack: Deda ZERO1

  • Size 46s: Length 90 mm

  • Size 49s: Length 100 mm

  • Sizes 52s - 55s: Length 110 mm

  • Size 58s: Length 120 mm

• Handlebar Tape: Colnago Black Grip, for a secure and comfortable grip during long rides.

• Bottle holder: Colnago matte black (1x), to always have water at hand.

Please note

Technical specifications may vary without notice based on component availability.
The product images are purely indicative and may not exactly reflect the described features.

With its versatility, the Colnago G4-X Shimano GRX 820 2x is perfect for any terrain, from gravel to the most challenging dirt roads. Choose this bike to take your riding experience to the next level, with the design and quality that only Colnago can offer.