Colnago G4-X SRAM Force XPLR E1 – Carbon Gravel Bike
The Colnago G4-X SRAM Force XPLR E1 represents the essence of high-performance gravel: a balanced, lightweight, and responsive bike, capable of excelling on any terrain.
The result of Colnago's racing experience, the G4-X combines handling, stability, and steering precision to deliver unique sensations, both in gravel races and off-road adventures.
Every detail has been optimized to offer superior performance, downhill control, and comfort on long distances, maintaining the unmistakable Colnago quality and design.
Technical Specifications
Series
Model
Frame and Fork
Frame: Carbon monocoque
Fork: Carbon for disc brakes, external cable routing, round cross-section
Headset: ACROS ss 42x52x7mm - 40x52x7mm
Seatpost: Carbon with 0.15 offset, D-Shape section
Thru axles: Ø 12 mm — Lengths: 100 mm (front) / 142 mm (rear)
SRAM Force XPLR E1 drivetrain
Shifter: SRAM Force XPLR AXS Disc
Front derailleur: Single chainring (1x13)
Rear derailleur: SRAM Force 13s RD-FRC-1E-E1
Chain: SRAM Force CN-FRC-E1 (standard silver)
Crankset: SRAM Force 40T
Cassette: SRAM Force 10-46 (13 speed) – CS-XG-1371-E1
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Crank arm length:
Sizes 450–480: 170 mm
Sizes 520–570: 172.5 mm
Bottom bracket: T47 SRAM DUB Road
Brakes
Type: SRAM Force disc brakes
Rotors: 160 mm front / 160 mm rear (CenterLine XR Rotor)
Brake levers: SRAM Force AXS HRD Shift-Brake System – ED-FRC-E1
Brake calipers: SRAM Force eTap AXS HRD Shift-Brake System
Wheels and Tires
Rims: Vision SC 45 Disc
Material: Carbon with hooks (hooked)
Rim height: 45 mm
Internal rim width: 21 mm
Hubs: Aluminum, sealed cartridge bearings
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Thru axles:
Front: HH12-100
Rear: HH12-142
Tires: Pirelli Cinturato Gravel 40 TLR
Maximum tire size: 42 mm nominal
Components
Saddle: Selle Italia NOVUS BOOST EVO Superflow FeC – Model X BB FEC
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Handlebar: CC.01 Wide integrated cockpit
Size 450: 400 mm
Sizes 480–540: 420 mm
Size 570: 440 mm
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Handlebar stem: Integrated (CC.01 Wide)
Sizes 450–480: 90 mm
Sizes 520–570: 100 mm
Handlebar tape: Colnago Grip Black
Bottle cage: Colnago Matt Black (1x)
Additional details
G4-X Series – designed for gravel racing performance
Weight and geometry optimized for efficiency and control on mixed terrains
Refined Colnago aesthetics and high-level performance
Note Well
Technical specifications may change without notice depending on component availability.
Product images are purely indicative and may not exactly reflect the described features.
Discover the Colnago G4-X SRAM Force XPLR E1 and experience gravel riding with the highest performance, control, and style signed by Colnago.
Do you want to receive your bike ready for use? Don't forget to add the bike assembly service at the time of purchase! Discover all the details here: Francesconi bike assembly
A Complete Guide to Bike Sizes
Foreword: Not all bike sizes are the same
Each type of bike has a specific frame and often uses a different size scale. For example, a road bike with a 54cm frame might be considered a medium size by one brand, but a large by another.
Bicycle adjustment margins
Some types of bikes, like gravel bikes, offer a wide range of adjustments, adapting to different body types. Other models, however, have limitations in this regard. This is an important aspect to consider.
How to use size charts
We've created a simple guide to help you find the right bike size:
- Check out our size charts for each bike type.
- Learn more with specific tips to help you make the right choice.
Size Charts: Find Your Perfect Bike
Gravel and road bikes
Sizes are based on the length of the top tube (in cm), which determines the reach of the bike.
| Cut
|
Recommended height
|
Horizontal tube length
|
| XS |
Up to 157 cm |
48-50 cm |
| S |
157-167 cm |
50-53 cm |
| M |
168-178 cm |
53-56 cm |
| THE |
178-185 cm |
56-58 cm |
| XL |
Over 185cm |
58-62 cm |
For gravel, measurements may vary slightly due to different geometries, but remain similar.
Mountain bike
MTBs are measured in inches, based on the seat tube.
| Cut
|
Recommended height
|
Size (in inches)
|
| XS |
Up to 157 cm |
14"-16" |
| S |
157-167 cm |
15"-17" |
| M |
168-178 cm |
16"-19" |
| THE |
178-185 cm |
18"-20" |
| XL |
Over 185cm |
20"-23" |
Sizes also vary depending on the type of MTB: full-suspension , hardtail or fat bike .
Children's bikes
The size depends on the size of the wheels, often associated with age:
| Age
|
Wheel Size
|
| 1-3 years |
12" |
| 2-4 years |
14" |
| 4-6 years |
16" |
| 5-8 years |
20" |
| 8-10 years |
24" |
| Over 10 years |
26"/27.5" |
What to do with half measures?
If you are between two sizes:
-
Comfort : Choose the larger size.
-
Performance : Go for the smaller size.
Final tips for choosing
-
Consult the manufacturer's instructions : Always check the brand's guidelines.
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Ask an expert : a specialized workshop can help you choose based on your height, ideal reach and goals.
-
Test the bike : If possible, test the model you intend to purchase.