Using the measurements above, you can begin to pick through available fitments to see what works for your application. If you were to order a custom-sized set of wheels, the manufacturer’s ordering form will ask for most all of these measurements. Using our square, we set its horizontal radius to our ideal tire height and used Tire Rack’s website to pick a wheel and its available backspacing to mock the lateral position of the tire with a sheet of paper. We checked the tire clearance at full lock and saw ample coverage. You can also use the square to mock the inner diameter of the wheel to ensure clearance of inboard components like tie rods, control arms, and shock mounts.
[ Once we knew the space limitations we had, we mocked up a 255/60R17 tire’s dimensions with a square and a sheet of paper representing the tire. We then cycled the steering and checked for clearance issues.