Spoke nipples come in different sizes, and using the wrong wrench rounds them off faster than you'd expect. Park Tool's SW series spoke wrenches each fit one specific nipple size precisely, which matters because a sloppy fit damages the flats and makes future truing adjustments harder or impossible. The stamped steel construction keeps the tool thin enough to work in tight spaces between spokes while maintaining the rigidity needed for meaningful tension adjustments.

Three sizes cover the range you'll encounter on most wheels. The SW-0 fits 3.23mm nipples, which is the green color code in Park Tool's system and shows up on various European wheels and some vintage builds. The SW-2 handles 3.45mm nipples with the red color code—this is the most common size on modern production wheels from major manufacturers. The SW-5 works with 3.96mm nipples using the black color code, typically found on heavier-duty wheels, some BMX applications, and older American-made wheels.

Each wrench uses a different grip color matching Park Tool's spoke nipple color coding system, so you can identify the right tool at a glance once you know what size your wheels need. The single-size design means no fumbling with a multi-gauge wrench trying to figure out which slot fits—you grab the color that matches your nipples and get to work.... Read More