Product Info
Details + Specs
Model Summary
The S-Works Crux 5 Frameset is the chassis behind the fastest gravel race bike ever made, built for riders who want to spec their own groupset and finishing kit around it. Not just because it's the lightest — at 789 grams it's the lightest frame in the Crux 5 range — not just because it's Specialized's most aero gravel platform, but because it delivers the lowest real-world Time to Finish of any gravel bike ever made. Crux 5 turns more of your effort into pure speed, validated across real race courses, real terrain, and real riders.
Key Highlights
- Ultra-light FACT 12r Carbon chassis: at just 789 grams, it's the lightest frame in the Crux 5 range, Rider First Engineered™ for size-specific ride quality.
- Full custom-build flexibility: a bare S-Works frameset lets you build the fastest gravel bike ever made around your own choice of groupset and wheels.
- S-Works FACT Carbon fork: a matched 12x100mm thru-axle carbon fork for a race-ready front end.
- Threaded BSA bottom bracket: a 68mm threaded shell for simple, reliable, creak-free maintenance.
- UDH derailleur hanger: Universal Derailleur Hanger compatibility for broad drivetrain compatibility and easy replacement.
- Includes S-Works finishing kit: ships with an S-Works Tarmac SL8 Carbon seatpost.
Technical Specifications
- Frame: S-Works Crux 5 FACT 12r Carbon, Rider First Engineered™, threaded BB, 12x142mm thru-axle, flat-mount disc, UDH dropout
- Frame Weight: 789g (size 56)
- Fork: S-Works FACT Carbon, 12x100mm thru-axle, flat-mount disc
- Bottom Bracket: 68mm BSA threaded
- Seatpost (included): S-Works Tarmac SL8 Carbon, FACT Carbon, 15mm offset
- Seat Binder (included): Integrated wedge
- Dropout: UDH (Universal Derailleur Hanger)
- Frameset Weight: Approx. 1.63kg (frame + fork, size 56)
- Use: Gravel racing