An exceptionally light, aero-focused gravel race frameset built for one thing: getting to the finish line faster.
The S-Works Crux 5 Frameset is Specialized’s top-level platform for riders building a no-compromise gravel race bike. Its ultra-light FACT 12r carbon frame, efficient aerodynamics and fast, precise handling are designed to turn more of your effort into real speed over mixed terrain.
Built for Gravel Racing
Crux 5 is designed around real-world speed, not just numbers on a scale. It combines low weight, aerodynamic shaping and confident dirt handling to help you push harder on climbs, carry speed across rough roads and stay efficient over long, demanding race days.
FACT 12r Carbon Chassis
The FACT 12r carbon frame has a claimed weight of just 789 g, creating an exceptionally light foundation for a custom gravel build. The matching FACT 12r carbon fork keeps the front end precise and responsive, whether you are sprinting on hardpack or picking your way through loose terrain.
Ready for a Purpose-Built Build
The frameset includes an S-Works Tarmac seatpost and uses a practical 68 mm threaded BSA bottom bracket. That gives you the freedom to choose the drivetrain, wheelset, cockpit and tyre setup that best suit your events, local gravel and riding priorities.
Key Features
- FACT 12r carbon gravel race frame
- Claimed frame weight: 789 g
- FACT 12r carbon fork
- S-Works Tarmac seatpost included
- 68 mm threaded BSA bottom bracket
- Lightweight, aero-focused gravel race platform
Who Is It For?
For serious gravel racers and performance-focused riders who want to create the fastest possible bike for their events, terrain and preferred component choices.
Our Thoughts
This is a frameset for riders who care about every watt and every gram. The low frame weight, threaded bottom bracket and included carbon seatpost make it an outstanding base for a light, fast and highly personal gravel race build.
Why Buy from Chain Reaction?
- Advice on planning a custom gravel race build
- Help selecting compatible drivetrain, wheels, tyres and cockpit parts
- Professional assembly and bike setup available
- Independent Christchurch bike shop
