Park Tool TM-1 Spoke Tension Meter

The Park Tool TM-1 Spoke Tension Meter is an essential tool for achieving that proper tension, and belongs on the workbench of anyone building or truing wheels, diagnosing wheel problems, or assembling new bikes. The reading of the TM-1 can be used to help estimate the relative tension of a wheel's spokes, identifying areas with high or low tension. Using the included printed table or the Park Tool Wheel Tension App, this measurement can be converted to kilograms-force in order to calculate the overall tension of a wheel and ensure that it is at the proper level. The Wheel Tension App also features interactive tools to help visualize and analyze a variety of data based on the TM-1's readings. Accurately measures the following spoke materials: steel (round and bladed), aluminum (round and bladed)*, titanium (round and bladed)*, Spinergy PBO, and Mavic R2R carbon fiber. *NOTE: conversion data only available for select sizes of aluminum and titanium spokes. The TM-1 is made in the USA and is able to be completely rebuilt and recalibrated, for a lifetime of reliable use.

• Accurate spoke‑tension readings: Measures the tension in each spoke so you can build, true, and service wheels with more consistent, even spoke tension.
• Works on almost any bicycle spoke: Designed to give kilogram‑force readings for nearly any bicycle spoke, regardless of material, diameter, or shape, so one tool covers most wheel builds.
• Easy‑to‑read mechanical gauge: Simple mechanical indicator shows how much the spoke deflects under load, which you then match to the included chart to read actual tension.
• Includes tension conversion chart: Supplied with a printed conversion table that lets you turn the meter’s readings into tension values in kilograms-force for different spoke sizes and types.
• Essential for wheel building & maintenance: A dedicated spoke‑tension tool for wheel building, truing, and diagnosing wheel issues—useful for both home mechanics and professional workshops.