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 Alongside Every Truing Stand.Features:- 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