Park Tool 輪組校正工具 (WAG-4)

The gauge slides smoothly along the rim and locks in place precisely, making it dead simple to spot even a 1mm dish error. I finally got my rear wheel perfectly centered on the first try.

I was checking the dish on an old wheel and the plastic gauge arm is surprisingly rigid, so it didn't flex even when I leaned on it a little. The instructions in the box were clear enough that I didn't have to look anything up online, which saved me time. I've used it three times now and it's exactl

The magnetic base held my wheel rock-steady while I checked the dish, and the gauge read true to the millimeter. It turned a fiddly job into something I actually trust, which is rare for this kind of tool.