Brake Caliper Slide Pins (Guide Pins)

They are greased and protected by rubber boots against dirt and water. Seized pins are a common cause of uneven pad wear and a pulling brake. Good workshops clean and re-grease them at every pad change. A pin that moves freely by hand after cleaning is a good sign.

When the piston pushes the inner pad, the caliper slides on its pins and pulls the outer pad against the disc.

Use only the grease specified for the pins, because the wrong grease can swell the rubber boots. Replace torn boots, as water quickly corrodes the pins.