Park Tool Wheel Alignment Gauge WAG-4

For a wheel to perform properly, it is important for the rim to be centered between the locknuts of the hub, or “dished”. To check this, and to make precision adjustments, a wheel alignment gauge (also called a “dishing tool”) is a must. An accurate and truly versatile wheel alignment gauge that belongs along side every truing stand.
The WAG-4 allows easy checking of the dish on road, mountain, or BMX wheels from 16” to 29” (ETRTO or ISO rim sizing of 305-630)
Works with any hub width
Can be accurately used with the tire still on the wheel