FSA Th-855 Headset

This headset is specifically designed for bikes with a 1-1/8" threadless steerer tube. Before purchasing, verify that your fork steerer matches this standard diameter.

The forged steel cups provide the necessary durability and structural integrity for the headset's load-bearing areas, while the nylon top cover helps keep the overall weight down to 126 grams without sacrificing performance.

Yes, the TH-855 is a complete headset assembly, meaning it includes all the necessary components like the cups, bearings, and top cover to replace or install a new headset on a compatible frame.

Caged ball bearings offer a reliable, smooth steering feel and are straightforward to maintain or service. While they require slightly more attention than sealed cartridge bearings, they are a proven, cost-effective solution for standard riding conditions.

The stack height is 14.9/11.1 mm. This measurement is critical because it determines how much space the headset occupies on your steerer tube, which affects how many headset spacers you might need to achieve the correct fit for your stem.