S-Works Crux Frameset - FACT 12r Carbon

S-Works Crux Frameset - FACT 12r Carbon

The S-Works Crux Frameset is the lightest gravel frame in the world, pairing that featherweight construction with genuinely capable tyre clearance and performance gravel geometry. Built from FACT 12r Carbon with Specialized's Rider First Engineered™ design, it applies the same breakthroughs that made Aethos the lightest bike ever to a dedicated gravel platform—a frame that climbs like a dream, floats over rough terrain, and weighs less than a full water bottle. With 47c/650b x 2.1" tyre clearance and race-influenced fit drawn from Crux's cyclocross heritage, this frameset is the ultimate foundation for a full custom gravel race build.

Product details

Key features

• Ultra-lightweight FACT 12r Carbon frame: just 725 grams (size 56)—the lightest gravel frame in the world, without sacrificing the stiffness needed for hard efforts.
• Massive tyre clearance: 47mm on 700c wheels or 2.1" on 650b, giving Diverge-level capability in a race-focused frame.
• UDH derailleur hanger: Universal Derailleur Hanger compatibility means the frame is ready for the latest SRAM Transmission drivetrains.
• Rider First Engineered™ geometry: each frame size is individually tuned for a consistent, race-ready ride feel across the size range.
• Complete frameset package: includes the matching S-Works FACT Carbon fork, threaded headset with carbon top cap, and Roval Alpinist Carbon seatpost—everything needed to build up a full custom race bike.
• Frame: S-Works Crux FACT 12r Carbon, Rider First Engineered™, threaded BB, 12x142mm thru-axle, flat-mount disc, UDH dropout, 725g (size 56)
• Fork: S-Works FACT Carbon, 12x100mm thru-axle, flat-mount disc
• Headset: Threaded, cartridge bearings, carbon top cap included