2. FIND CHASSIS CONTACT POINTS
Next, the first obstructions in width you’ll typically run into: tie rods, shocks, and control arms. When running a stock-diameter wheel, this is especially important if you add drop spindles (which move the axle centerline relative to the control arms, putting the lower control arm nearer the rim). Measure from the face of the hub to the first point of contact and make note of the distance from the wheel centerline. We’ll use these numbers later to decide if the chosen wheel diameter (namely, its inner diameter) and width will fit over these hard points.
[ We could see that the tie rod needed at least 4 inches of clearance relative to the hub face and approximately 15 inches of inner barrel diameter to clear if we went wider than (or adjust the offset inward with) a 15x8-inch wheel. Neither is a concern with 17s.