Park Tool Master Mechanic Spoke Wrench

This wrench is compatible with .127 and .136 nipple sizes, which are standard for many bicycle wheels. Before purchasing, verify the nipple size on your specific wheelset to ensure a proper fit.

Unlike stamped steel wrenches that can flex or round off spoke nipples, this tool is investment-cast and heat-treated. This manufacturing process provides significantly higher durability and a precise fit that protects your nipples from damage during tensioning.

Yes, it is designed for both routine truing and full wheel builds. The ergonomic shape provides the leverage and control needed for the repetitive adjustments required when lacing and tensioning a new wheel.

The polished and plated finish reduces friction, allowing the wrench to slide onto the nipple smoothly. This helps you feel the engagement more clearly, which is critical for making accurate, incremental adjustments.

Spoke nipples come in various sizes depending on the manufacturer and the type of wheel. Always measure your nipple flats with a caliper or check your wheel manufacturer's specifications to ensure you are using the correct wrench size, as using the wrong size can strip the nipple.