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. Park Tool WAG-4 Wheel AlignmentGaugeFeatures Never let accuracy be your nemesis with this simple yet highly effective tool Can be used with or without the tyre fitted to the wheel, thanks to its innovative design Ensures the rim is centred between the locknuts of the wheel hub Any hub width can be accommodated Fits wheels from 16 to 29 inches Made in the USA and covered by Park Tool's legendary limited lifetime warranty