1940646 / 54293810807130

Sale

Final Few

Sale

Final Few

Colnago

Colnago G4X GRX Di2 Gravel Bike

£4,275.00

£5,999.00

Save 29%

The Colnago G4-X Gravel Bike features a lightweight full carbon frame and fork, refined geometry for confident handling, and clearance for tyres up to 45 mm, delivering speed, stability, and control on mixed terrain.

52cm45cm57cm

Delivery

Select size to see delivery options

Collect in Store

Cycle to Work – Save up to 42%

Spread the cost of your new bike and save up to 42% through the Cycle to Work scheme. We accept all major providers including Cyclescheme, Green Commute Initiative, Bike2Work and more. Check with your employer for eligibility.

Free Delivery on all bikes

Complimentary standard delivery on all bikes to UK mainland addresses. Orders typically arrive within 2–5 working days. A signature is required on delivery. When you receive your bike all you'll need to do is unpack it, attach your pedals, turn the handlebars and ride.

Premier Delivery

Upgrade to Premier Delivery at checkout for a nominated day, extended assembly and in-home handover by a trained technician. Available on eligible bikes across UK mainland.

Built, checked, tuned & 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.

Pedals & accessories

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

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Product Details

Colnago G4X Shimano GRX Di2 Gravel Bike

The Colnago G4-X Gravel Bike is built for speed, stability, and control on mixed terrain. Evolving from the G3-X, it features refined geometry for confident handling on descents, clearance for tyres up to 45 mm, and a lightweight full carbon frame and fork.

Colnago's versatile drivetrain compatibility

The G4-X is compatible with both 1x and 2x drivetrains, mechanical or electronic shifting, and uses a threaded T47 bottom bracket for durability and easy maintenance.

G4-X's adventure-ready features

A UDH rear hanger and four mounting points make it ready for long-distance and bikepacking setups. The UCI-approved cyclocross frame and flared integrated cockpit ensure it performs in competitive and adventurous scenarios alike.

Features

Fork: Colnago G4-X
Headset Bearings: Acros ss 42x52x7mm - 40x52x7mm
Thru Axles: Colnago Thru-Axles, 12x123/170.5 rear UDH Ø12 L170.5mm
Wheels: Vision SC45 i23 12mm thru axle
Tyres: Pirelli Cinturato 700-40C
Crankset: Shimano FC-RX825-2 48-31T
Bottom Bracket Type: T47
Chain: Shimano CN-M8100
Front Derailleur: Shimano RX-825 Di2
Rear Derailleur: Shimano RX-825 Di2
Cassette: Shimano 11-36T
Shifters: Shimano RX825 Di2
Handlebar: Colnago CC01 Integrated
Stem: Colnago CC01 Integrated
Brake Calipers: Shimano BR-RX825
Saddle: Selle Italia Model X BB FEC
Seatpost: Colnago Carbon
Brake Rotors: Shimano RT-M800

Specifications

Model: G4X GRX Di2
Bottom Bracket Standard: T47
Brakes [Kind]: Hydraulic Disc
Brakes [Maker]: Shimano
Brakes [Model]: BR-RX825
Cassette [Gearing]: 11-36
Cassette [Maker]: Shimano
Chain [Maker]: Shimano
Chain [Model]: CN-M8100
Chainring [Gearing]: 48–31
Crank [Maker]: Shimano
Crank [Model]: FC-RX825-2
Discipline Compatibility: Gravel
E-Bike: No
Family: G4X
FD [Maker]: Shimano
FD [Model]: RX-825 Di2
Fork [Axle Type]: 12mm Thru-Axle
Fork [Brake Type]: Disc
Fork [Maker]: Colnago
Fork [Material]: Carbon
Fork [Model]: G4-X
Fork [Wheel Size]: 700c
Frame [Hanger Standard]: UDH
Frame [Material]: Carbon
Frameset: No
Gearing [Configuration]: 2x
Gearing [Kind]: Conventional
Gender: Unisex
Handlebar [Kind]: Drop
Handlebar [Maker]: Colnago
Handlebar [Shape]: Drop bar
RD [Maker]: Shimano
RD [Model]: RX-825 Di2
Saddle [Maker]: Selle Italia
Seatpost [Kind]: Rigid
Seatpost [Maker]: Colnago
Seatpost [Material]: Carbon
Shifters [Maker]: Shimano
Shifters [Model]: RX825 Di2
Shifting: Electronic
Suspension Configuration: Rigid
Tires [Maker]: Pirelli
Tires [Width]: 40 mm
Wheels [Configuration]: Front+Rear
Wheels [Kinds]: Tubeless Ready
Wheelset [Inner Width]: 23 mm
Wheelset [Maker]: Vision
Wheelset [Model]: SC45 i23
Product code: 1940646 / 54293810807130

Size Guide

—	48	50	52	54	56
A	563	584	604	625	639
B	480	500	520	540	560
C	529	540	550	565	582
D	513	525	532	546	564
E	74.5°	74°	73.57°	72.83°	72.71°
F	71.52°	71.62°	71.92°	72.49°	72.88°
G	137	156	173	190	202
H	43	43	43	43	43
I	408	410	410	412	414
J	-	-	-	-	-
K	542	562	579	597	610
L	378	378	379	380	392

If you fall between sizes, we recommend experienced riders selecting a smaller frame which will offer faster handling. A larger bicycle offers more stability.

Should you have any specific questions, please contact us for information and talk to one of our experienced members of staff.

A: Seat Tube (CTR-TOP)

B: Seat Tube (CTR-CTR)

C: Effective Top Tube

D: Actual Top Tube

E: Seat Angle

F: Head Angle

G: Head Tube

H: Stack

I: Chainstay

J: Wheelbase

K: Stack