This guide works with aluminium, steel and carbon fibre tubes, so it is suitable whether you are cutting a metal steerer or a carbon one. For carbon steerers, it is worth using a fine-tooth saw blade meant for carbon fibre and wrapping the cut area with tape beforehand to prevent the fibres from fraying.

Clamp the guide securely around the tube at your marked cut line, making sure it sits square to the tube's axis, then run your saw blade through the guide's slot, letting the guide keep the blade level and perpendicular throughout the cut. Using slow, steady saw strokes rather than forcing the blade gives the cleanest, most wobble-free result.

Cutting a steerer tube is a one-way, permanent job, so it is worth measuring twice and cutting once, but with this guide keeping the cut straight, it is a very achievable task for a careful home mechanic fitting a new fork or adjusting stack height. Always leave a small margin above your target length in case final adjustments are needed.

Yes, this guide is designed for cutting round tubes generally, which includes handlebars in addition to fork steerers, making it useful whenever you need to trim a handlebar to a narrower width or shorten a steerer for a new build.

By clamping firmly around the tube and guiding the saw blade through a fixed slot, the tool prevents the blade from drifting off line or bouncing during the cut, which is what typically causes a wobbly, uneven edge when cutting freehand. This makes for a cleaner cut edge that needs less filing or deburring afterward.

Yes, this is a genuine Le Bicycle tube saw guide sold through DoGoodCo, built to clamp securely and hold a saw blade steady across multiple cuts. If your tool arrives damaged or defective, our support team will help arrange a replacement as per store policy.