Here's a list of things to inspect, clean or lubricate while the wheels are off for a tire change:
(The wheels don't have to be off to do all of these maintenance points, and not all need to be done every time)
>Check the wheel bearings for smoothness and play.
>Clean and check the brake pads for wear; polish and grease the pin(s) very lightly with a silicone based grease..
>Clean the brake pistons and restore their motion in and out of the calipers evenly. This involves