FSA TH-857 Headset

This headset uses the EC34/28.6 | EC34/30 standard, which means it is designed for frames with a 34mm head tube inner diameter and a standard 1 1/8-inch straight steerer tube. Before purchasing, measure your head tube's inner diameter and confirm your fork's steerer tube size to ensure compatibility.

Yes, the FSA TH-857 includes the necessary crown race, which is sized for a 30mm fork crown seat. It is a complete external cup headset assembly ready for installation.

The TH-857 is designed for versatility and can be used across various cycling disciplines. Its durable construction is built to handle the steering demands of both road and mountain biking, provided your frame meets the required 34mm head tube specifications.

While the design is straightforward, installing a headset requires specific tools, including a headset press and a crown race setter. If you have these tools and experience with bike maintenance, it is a manageable task, but we recommend visiting a local bike shop if you are unsure about the process to avoid damaging your frame.

EC stands for 'External Cup.' This indicates that the bearing cups sit outside of the head tube, which is a classic, reliable design that is easy to service and compatible with many traditional bicycle frames.