Park Tool WAG-4 Wheel Alignment Gauge

No, the WAG-4 is designed to work with the tire installed. This saves you significant time during the wheel truing process since you do not need to strip the wheel down to check the dish.

Yes. Because the gauge measures the rim position relative to the hub locknuts rather than relying on a fixed width, it is compatible with any hub width, including standard, boost, and fat bike spacing.

While a truing stand helps you get the wheel round and true, it doesn't always guarantee the rim is perfectly centered over the hub, which is known as 'dishing.' The WAG-4 is the specific tool used to verify that the rim is centered, ensuring your wheel tracks straight.

Yes, the WAG-4 is highly adjustable and accommodates a wide range of wheel sizes, from small 16-inch youth wheels all the way up to 29-inch mountain bike wheels.

A wheel is correctly dished when the rim is perfectly centered between the two locknuts of the hub. You use the WAG-4 to measure the distance from the locknut to the rim on one side, then flip the tool to check the other side; if the measurements match, your wheel is properly dished.