Headset Basics
Headset types (threaded vs threadless), adjustment, overhaul, and common issues.
Lesson Details
Skills to cover in the shop
- Threadless headset adjustment
- Threadless headset service
Supporting videos
Key procedures / notes
- Headset is the bearing system connecting the fork to the head tube so the bars can steer smoothly.
- Main types: threaded and threadless. Standards include EC (external cup), ZS (zero stack), IS (integrated).
- Top and bottom head-tube bore diameters may differ — match the headset to the frame.
Skill Check: 12 Threadless Headset. Diagram: 12 Headset.pdf. Slide deck: 12 Headsets.pdf.
What you’ll do
Follow the procedures in the lesson document. Complete any note guides or worksheets, then perform the hands-on skill check.
Support materials
Recommended reading
Park Tool Big Blue Book: pages 194–198 (Chapter 14). Stop at Threaded Headset Service.