The Park Tool SW-40 Four-Sided Spoke Wrench, click to enlarge
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Item # SW-40

/ Tools / Wheel & Spoke

Four-Sided Spoke Wrench — 3.23 mm

The Park Tool SW-40 uses the same world famous design and high quality materials as our three-sided spoke wrenches, with a unique four-sided wrench design for extra strength and support to help prevent slipping and deformation of nipples. Each SW-40 is made in the USA, and is heat treated and nickel plated for long service. Park Tool spoke wrenches are vinyl dipped to indicate the size at a glance.

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SW-40 Features

  • Sized for spoke nipples with 3.23 mm (0.127") wrench flats
  • Equivalent to Park Tool SW-0
  • This size is often found on higher-end bikes
  • Typical compatible nipple brands include DT Swiss, Sapim, Wheelsmith, Pillar, and many others — always measure to be sure