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

The Colnago G4-X Shimano GRX 820 2x Bicycle represents excellence in the world of gravel bikes. With a perfect balance of lightness, handling, and stability, this bike is designed to excel on every type of terrain, from white roads to the toughest 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 races and leisure rides.

Perfect Gravel Bike for Every Terrain

The Colnago G4-X Shimano GRX 820 2x is a bicycle designed for those seeking superior performance in gravel races or rides on dirt 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 guarantees maximum control and comfort.

Technical Specifications

Frame Kit

• Frame: Carbon monocoque, designed to ensure a lightweight yet robust bike, capable of tackling even the most challenging terrains.

• Fork: Carbon for disc brakes, with external cable routing and round section, ensuring smooth handling and better shock absorption.

• Headset: ACROS ss 42x52x7mm - 40x52x7mm, ensuring precision in bike steering.

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

• Thru Axles: Diameter 12 mm, length 100 mm (front) and 142 mm (rear), to ensure secure and stable mounting.

Drivetrain

• Shifter: Shimano GRX 820 2x, with a wide gear range to tackle every 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 transmission efficiency.

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

• Crankset: Shimano GRX 2x, with 48-31T gearing, offering a good balance of power and lightness.

• Cassette: Shimano GRX 2x, 11-36 12V, for a wide gear range suitable for every situation.

• Bottom Bracket: Shimano SM-BB72-41B Press Fit Movement 86.5x41, ensuring greater durability and strength.

• 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 brake control.

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

Wheels

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

• Rims: 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 Rim Width: 22 mm, for better compatibility with gravel tires.

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

• Thru Axles: HH12-100 (front) and HH12-142 (rear), for increased safety and stiffness.

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

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

Components

• Saddle:

  • "Prologo" 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 Stem: 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 Cage: Matte black Colnago (1x), to always have water within reach.

Note Well

Technical specifications may change without notice depending on component availability.
Product images are for illustrative purposes only 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.