Cutting a steerer tube with a hacksaw sounds simple until you end up with a crooked cut that won't sit flush against your stem or headset cap. The Park Tool SG-6 Threadless Saw Guide clamps onto the steerer and gives your saw blade a fixed reference slot, so the cut stays perpendicular to the tube axis instead of wandering off at an angle. It's the difference between a clean, professional result and having to file down a wonky cut hoping nobody notices.

The guide accommodates threadless steerers from 1-inch through 1-1/2-inch diameter, which covers everything from vintage road bikes through modern tapered mountain and gravel forks. Spring-loaded jaws self-center on the tube, so you don't need to fuss with alignment before clamping. The saw slot is sized for standard hacksaw blades—32 teeth per inch works well for aluminum and carbon steerers, giving you a smooth cut without excessive heat buildup on composite materials.

Setup takes about thirty seconds: slide the guide onto the steerer at your cut mark, tighten the thumbscrew until the jaws grip firmly, and start sawing. The guide body stays put while you work, preventing the blade from skating across the surface on that first stroke where most cuts go wrong. Once you're through, you'll still want to face the edge with a file or dedicated facing tool, but you're starting from a square cut instead of trying to correct a mistake.... Read More