Park Tool Reamer

Yes, these reamers are designed to function as part of the Park Tool HTR (Head Tube Reamer) system. You will need the HTR-1 or HTR-1B handle assembly to operate them correctly.

You must measure your headtube's inner diameter or consult your frame manufacturer's technical specifications. The reamer size must match the specific headset standard you are installing, such as 1-inch, 1-1/8 inch, or 1-1/2 inch integrated standards.

No, these hardened steel reamers are specifically engineered for metal frames, such as steel or aluminum. Using them on carbon fiber can damage the frame structure and is not recommended.

Yes, always use a high-quality cutting fluid when operating these tools. It helps ensure a smooth, clean cut, prevents the metal from galling, and significantly extends the lifespan of the reamer's cutting edges.

The 33.9mm reamer is sized for standard 1-1/8 inch external cup headsets, while the 43.95mm reamer is designed for 1-1/8 inch Zero Stack (ZS) headsets, which require a larger internal diameter for the cups to seat properly.

Reaming a headtube is a precision task that removes material from your frame. While the tools are straightforward to use, you should be comfortable with bike mechanics and have a steady hand to ensure the headtube remains perfectly aligned.