Wheel/Tire Simulator

Finally a Professional and easy way to Measure Backspace in 1/8" increments or Offset in 2 mm increments on wheels with or without a tire mounted. Works with 14" thru 32" Diameter Wheels up to 15" widths. Wheel well compass is a cool tool. Simply remove your axle cap and mount the compass shaft, set the marker to the desired radius you want and swing your arc marking your body for a clean line to cut your wheel well.