Colnago G4-X Gravel Bike (Shimano GRX 820 2x)

Colnago G4-X Gravel Bike (Shimano GRX 820 2x)

A balanced gravel racing bike, to perform at its best in every context.
The G4-X is the result of optimizing all those factors that are important when you have to compete or go hard on dirt roads: handling, lightness, downhill rideability, stability, frame responsiveness, and, like all Colnago bikes, surprisingly wonderful to ride.

Series

V Series

Model

Colnago G4-X

Frame kit

Frame (material)

Monocoque carbon.

Fork (material, section notes)

Carbon fork for disc brakes, external cables, section with round circumference

Headset bearings

ACROS ss 42x52x7mm – 40x52x7mm

Seatpost

Carbon seatpost, 0.15 offset, “D-Shape” section

Through axles

Diameter: 12 mm. length 100 mm (front) – 142 mm (rear)

Drivetrain

Shifting system

Shimano GRX 820 2x

Front derailleur

Shimano GRX 2x: Shimano FD-RX820

Rear derailleur

Shimano GRX 2x: Shimano RD-RX820

Chain

Shimano GRX: Shimano CN-M8100 12V

Crankset

Shimano GRX 2x: 48-31T

Cassette

Shimano GRX 2x: 11-36 12v

Bottom bracket

Shimano SM-BB72-41B Press Fit Movement 86.5×41

Crank length

Sizes 450 – 480

170 mm

Sizes 520 – 540

172.5 mm

Sizes 570

175 mm

Brakes

Brakes

Shimano RX-820, 160 mm Front / 160 mm Rear, RT-MT800-S rotors

Disc size

160 mm Front/ 160 mm Rear

Brake lever

Shimano ST-RX820

Brake caliper

Shimano RX-820

Wheels

Wheels

Fulcrum Rapid Red 900 DB | 2-Way Fit Ready (for tyre and tubeless ready)

Material

Rims: aluminium, Spokes: stainless steel.

Rim height

Front: 24 mm; Rear: 24 mm

Internal channel width

22 mm

Hubs

Aluminium, Sealed Cartridge Bearings

Through axles

Front: HH12-100 – Rear: HH12-142

Tyres

Pirelli Cinturato Gravel 40 TLR

Maximum tyre size

42 mm (nominal width)

Components

Saddle

“Prologo” Kappa BK

“Selle Italia” Model X BB FEC

Handlebar

Deda Gravel 100

Sizes 46s

Width: 400 mm

Sizes 49s – 55s

Width: 420 mm

Sizes 58s

Width: 440 mm

Stem

Deda ZERO1

Size 46s

Length: 90 mm

Size 49s

Length: 100 mm

Sizes 52s – 55s

Length: 110 mm

Sizes 58s

Length: 120 mm

Handlebar Tape

Colnago Grip Black

Bottle cage

Colnago Matt Black (1x)