How to use a bicycle torque wrench correctly

Published

By Pro Sport Lights · Content updated

Torque wrench set with blue handle, bits and extension in a black case

The short answer: Use the manufacturer’s torque specification for the particular component. There is no single Nm value for every stem. A torque wrench with a 2–24 Nm range is suitable only when the specified value falls within that range.

How to find the correct torque

Find the value on the component or in the bicycle and component manufacturers’ documentation. Also check the prescribed preparation of threads and contact surfaces. Use lubricant or assembly paste only where the manufacturer specifies it.

A general table is a reference at most. Park Tool explains why component and manufacturer specifications take priority.

Using an adjustable click-type torque wrench

  • Check that the wrench, bit and bolt suit the application.
  • Set the specified value according to the wrench manual.
  • Insert the bit fully and squarely into the bolt head.
  • Hold the wrench at the indicated position on the handle and apply force steadily.
  • Stop at the signal or felt release; do not keep tightening.
  • Check any specified tightening sequence when there are multiple bolts.

What does the Pro Sport Lights 2–24 Nm set include?

The Pro Sport Lights torque wrench set has a 1/4-inch drive, a 2–24 Nm range and 0.2 Nm scale increments. It includes an extension, Phillips PH1/PH2/PH3, Torx T20/T25/T30 and hex 2.5/3/4/5/6/8/10 mm bits, plus a case.

0.2 Nm is the scale increment, not a stated measurement error. Check the current contents on the product page; other torque wrench sets may contain different items.

Common mistakes

  • Applying an example value such as 7 Nm to every stem.
  • Trying to use a setting outside the measurement range.
  • Continuing to tighten after the wrench has indicated the set torque.
  • Using a precision wrench to break seized bolts loose.
  • Using a poorly fitting bit or working at an angle to the bolt.

Storage and maintenance

Store a torque wrench clean and dry in its case. Follow your model’s storage and calibration instructions. Click-type wrenches are generally stored at the lowest scale setting, not below the range. Have the wrench checked after a hard fall.

Further information: Park Tool on using and maintaining torque wrenches.

Need help choosing? Email info@prosportlights.com with your question and, where relevant, the model or your head circumference. We will help you choose.

Back to blog