The Park Tool SG-6 Threadless Saw Guide is a precision alignment tool that makes cutting steerer tubes and other cylindrical components clean, straight, and accurate. When trimming a fork’s steerer to fit your bike’s head tube height, maintaining a perfectly perpendicular cut is critical for proper headset performance and headset crown race seating. The SG-6 clamps securely around the steerer tube and guides your saw blade so you get a smooth, square cut every time — reducing finish work and improving final assembly quality.

Engineered for workshop and home mechanic use, the SG-6 fits most threadless steerer tubes and works with standard hacksaw blades. Its sturdy construction holds the tube steady during cutting, minimizing wobble and blade drift that can cause angled or rough cuts. Whether you’re shortening steerers, trimming cable housings, or performing custom fabrication, the SG-6 gives you confidence that your cuts will be straight and true. The tool’s compact design also makes it easy to store alongside other service tools when not in use.