Do the bolt-on wheel spacers or adapters increase the load on suspension parts?
The suspension loads are only affected by the centerline of the wheel. Billet adapters usually correct offset issues when bolting newer style high offset wheels onto older cars or trucks that were designed with low offset wheels. A wheel with a 25mm offset and a 1″ adapter is identical to the suspension as a 0mm factory wheel. These loads are the same on the wheel studs, bearings, bushings, because the wheel is in exactly the same location on the car.