FSA

Compressor Pro Carbon, 1-1/8" Steerer Tube Compression Plug

The FSA Compressor Pro Carbon is the go-to upgrade for riders running a carbon steerer who want a cleaner, more secure headset setup. Designed to replace the traditional star nut and top cap assembly, this compression plug provides reliable preload without damaging lightweight carbon fiber—keeping your steering precise and your cockpit dialed.

Built with FSA’s attention to detail and proven performance, the Compressor Pro Carbon delivers a solid, confident feel whether you're powering up climbs or descending at speed. Easy to install and fully serviceable, it’s the small part that makes a big difference in setup quality and long-term frame protection.

Key features:

• Compatible with 1-1/8" carbon steerer tubes
• Replaces traditional star nut and top cap assembly
• Includes precision-machined cap, bolt, and expander
• Improves steerer tube integrity and headset adjustment
• Lightweight, durable design for dependable performance