Step 8: Step 1: Bumpers  Drill if necessary

Picture of Step 1: Bumpers  Drill if necessary

As I was merely replacing existing wheels on my footrest, the footrest already had pre-drilled holes. If this is not the case with your wheelchair, you will need to drill two holes, one on the far right corner of the right footrest, and one on the far left corner of the left footrest. This hole should be close to the edge, but should not compromise the structural integrity of the footrest. Be sure to check with your wheelchair's warranty before making any permanent modifications.