The majority of MTB disc brake pads are designed to fit specific calipers, so you will need to buy a pair that is compatible with the make and model of your brake caliper/system. Changing your pads is generally an easy job - check YouTube or the brake manufacturer’s website for a tutorial. New pads will have to be ‘bedded in’. This means spending a few minutes braking hard in order to lay down a thin layer of transfer film onto the rotor surface. Properly bedded-in brakes will ensure smoother braking down the line and minimize brake judder.