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Hidden spoke nipples cheat wind, but require specific equipment like Park Tool's innovative SW-15 3-Way Internal Spoke Nipple Wrench. The SW-15 features a 3.2mm square drive, and both 5 and 5.5mm hex drive sockets.
The low-profile walls fit perfectly in the tight surroundings of most rims, and the Park Tool blue vinyl coating offers a secure grip. This wrench works with wheels made by FSA, Blackwell, Planet-X, HED, Rolf, Bontrager, Campagnolo, and Mavic. Like all Park Tools, the SW-15 3-way Internal Spoke Nipple Wrench has a lifetime warranty.