Park Tool TM-1

Yes, the TM-1 works with most bladed and aero spokes, though you will need to be careful with placement to ensure the tool sits squarely on the flat surface of the spoke for an accurate reading.

The TM-1 is calibrated at the factory, so it is ready to use right out of the box. However, because it is a mechanical tool, it is good practice to check it against a known tension reference periodically if you use it heavily.

The tool provides a numerical reading that corresponds to a conversion chart included in the manual. For a more streamlined experience, you can input these numbers into the Park Tool mobile app, which automatically calculates the tension in kilograms-force for you.

Yes, the TM-1 is compatible with carbon fiber spokes. Just ensure you are referencing the correct conversion chart or app setting for your specific spoke material to get an accurate tension measurement.

Being rebuildable means that if the tool wears down or loses accuracy over years of heavy shop use, you can replace individual internal components rather than buying an entirely new unit. It is designed to be a long-term investment for your workbench.

Yes, the TM-1 is designed to work on virtually any bicycle wheel size, from small BMX wheels to large 29-inch mountain bike or 700c road wheels, as long as the spokes are accessible.