Step 11: Step 4: Bumper attach

Picture of Step 4:  Bumper attach

Attach the bumper wheel to the footrest using the bolt. Put washers between the wheel and the footrest and between the wheel and the nut to allow it to spin freely.  Note:   You may on occasion have to tighten the bolt as it will eventually work loose if the bumpers spin frequently from bumping into things.  Normally, the wheels don't move, so the bolt does not loosen.