How can brake pads be visually inspected for wear?

Visually inspecting brake pads for wear primarily involves checking their thickness. This is a crucial aspect because the thickness of the brake pads directly affects their effectiveness in creating friction against the rotors. Over time, brake pads wear down due to constant friction and heat generated during braking.

When inspecting the brake pads, measuring the remaining thickness provides a clear indication of whether they are still within safe operating limits or need replacement. Most manufacturers specify a minimum thickness for pads, and knowing how to measure this can help ensure proper functionality and safety.

While discoloration and cracks can signal other issues with the brake system, they are not definitive indicators of wear level. Additionally, checking for rattling does not provide a direct measure of pad wear and is more related to potential issues with the brake assembly. Therefore, assessing the thickness of the brake pads is the most effective and informative method for determining their condition.