Specialized S-Works Crux Frame - Pink Yellow Blue

Specialized S-Works Crux Frame – The world's lightest gravel frame

The Specialized S-Works Crux represents the pinnacle of gravel technology: ultralight, responsive, and with a wide capacity for large-volume tires. Now even more advanced thanks to the integration of the new UDH (Universal Derailleur Hanger) rear dropout, it is the perfect base to build a high-performance gravel bike without compromises.

Why choose the S-Works Crux frame

• FACT 12r frame weighing only 725g: the lightest in the gravel category. Designed with Rider First Engineered™ technology to ensure consistent performance across all sizes.

• Extra tire clearance: compatible with tires up to 47c / 650b x 2.1”, to tackle even the roughest terrain with maximum confidence.

• Gravel Performance Geometry: inspired by the legendary cyclocross Crux, it offers agility, stability, and comfort even on long distances.

• Updated with UDH dropout: extended compatibility with the latest drivetrains, increased impact resistance, and ease of replacement.

Technical Specifications

Frame

• Model: S-Works Crux FACT 12r Carbon

• Technology: Rider First Engineered™

• Bottom bracket: Threaded BSA

• Brake compatibility: Flat-mount disc

• Rear axle: 12x142 mm thru-axle

• Derailleur compatibility: UDH (Universal Derailleur Hanger)

Fork

• Model: S-Works FACT Carbon

• Front axle: 12x100 mm thru-axle

• Brakes: Flat-mount disc

Cockpit

• Seatpost: Roval Alpinist Carbon

• Seat collar: Specialized alloy, 30.0 mm, with titanium bolt

Weight

• Frame weight (size 56): 1.43 kg (3 lb, 2.4 oz) – inclusive of frame, fork, seatpost, and collar

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.

The S-Works Crux Frame is the ideal choice for demanding gravel cyclists who want to build a lightweight, high-performance, and versatile bike, ready to tackle races, long off-road adventures, and gravel roads. It is simply the perfect starting point for a bike that knows no limits.

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:

1. Check out our size charts for each bike type.
2. 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.

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.

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:

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

1. Consult the manufacturer's instructions : Always check the brand's guidelines.
2. Ask an expert : a specialized workshop can help you choose based on your height, ideal reach and goals.
3. Test the bike : If possible, test the model you intend to purchase.