FSA NO.54 Integrated Headset

An Integrated System (IS) headset means your frame is designed with bearing seats machined directly into the headtube. This allows the cartridge bearings to drop straight into the frame without the need for traditional pressed-in cups, resulting in a cleaner look and easier installation.

The FSA NO.54 is designed for a standard 1-1/8 inch steerer tube. Before purchasing, confirm your fork's steerer diameter matches this size, as it is not compatible with tapered steerer tubes that require different bearing sizes at the top and bottom.

Beyond the 1-1/8 inch steerer diameter, you need to ensure your frame's headtube is compatible with the IS (Integrated System) standard. Check your current headset or frame specifications to confirm the bearing seat angle and diameter match the requirements for the FSA NO.54.

Yes, the stack height affects how your stem sits on the steerer tube. The FSA NO.54 has a total stack height of 17.55 mm, which you should account for when measuring your steerer tube length to ensure you have enough space for your stem and any necessary spacers.

This model uses sealed cartridge bearings, which are designed to be low-maintenance and resistant to the elements. While they are generally not serviceable in the sense of replacing individual balls, they are easily replaceable as a complete unit if they eventually wear out.