FSA

Premium C-40 Lower IS52/40 36x45

The FSA Premium C-40 Lower IS52/40 36x45 delivers the precision, smoothness, and reliability discerning riders expect from one of the most trusted names in cockpit components. Designed as part of FSA’s flagship headset range, this lower assembly provides a rock-solid interface for tapered steerer setups, ensuring consistent steering performance and long-term durability on every ride.

Built for integrated frames using an IS52/40 lower standard, the C-40 offers a clean, low-profile fit that keeps everything aligned and running quietly. Whether you’re upgrading your road bike or maintaining your mountain machine, this lower headset brings the same pro-level quality found in FSA’s complete systems—without the need to replace more than what’s necessary.

• High-precision bearings for smooth, consistent steering feel
• IS52/40 integrated fit ideal for tapered steerer tubes
• Durable materials and finish built to handle real-world riding conditions
• Perfect replacement or upgrade for riders who value quality and longer service life

When it comes to keeping your front end tight and responsive, the FSA Premium C-40 Lower IS52/40 is the component that brings precision engineering directly to your steering performance.