Description
The Park Tool USA SW-40 .127 Spoke Wrench is a compact, professional-grade pedal wrench category hand tool alternative for wheel service, designed to tighten or loosen spoke nipples on bicycle wheels that use 3.23 mm / 0.127 inch flats. It is ideal for wheel truing, spoke tension adjustments, and routine shop or home bike maintenance.
- Fits spoke nipples with 3.23 mm (0.127 inch) wrench flats.
- Park Tool SW-40 uses a four-sided opening for greater contact and improved control during wheel truing.
- Commonly used with many standard square-profile brass and aluminum spoke nipples.
- This sw- spoke wrench replacement is the correct size when your original SW-40 is worn, lost, or no longer gripping nipples cleanly.
- Official Park sizing identifies the SW-40 as the black-handled 0.127 inch / 3.23 mm version.
Built with the same durable construction Park Tool is known for, the SW-40 features a unique four-sided design that supports the nipple on more surfaces than typical three-sided styles, helping reduce slipping and rounding during adjustment. The vinyl-dipped handle offers quick size identification and a comfortable grip in the stand or on the bench. This park tool usa sw- spoke wrench is an OEM Park Tool product rather than a generic aftermarket copy, making it a smart choice for mechanics who want dependable fit and repeatable results. Installation difficulty is minimal since no assembly is required – just match the wrench to the correct nipple size and begin adjustments carefully.
An OEM-quality replacement for precise spoke service, with easy DIY use and fast shipping from our warehouse.



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