What is the reason for an ungrounded outer ring on the brake disc?
2 Answers
Uneven brake pads should be replaced promptly. Here is more information about brake pads: 1. Automotive brake pads, also known as brake linings, refer to the abrasive materials fixed on the brake drum or disc that rotates with the wheel. The friction lining and friction blocks bear external pressure to generate friction, thereby achieving the purpose of vehicle deceleration. 2. Brake shoes, commonly known as brake pads, are consumables that gradually wear out during use. When worn to the limit, they must be replaced; otherwise, braking efficiency will be reduced, and even safety accidents may occur.
As an experienced driver with hundreds of thousands of kilometers under my belt, I've encountered situations where the outer rim of the brake disc wasn't being worn properly. The main reasons are either improper installation of brake pads or pads that are too small to cover the entire disc surface. Sometimes, grease contamination or rust on the disc can also cause partial non-contact, affecting friction performance. Another possibility is stuck guide pins preventing the pads from fully contacting the disc. If left unrepaired, prolonged driving may lead to squeaking noises or even reduced braking power, which is particularly dangerous in rainy conditions. I recommend first checking if the disc surface is smooth and free of stains. If not, it's best to visit a professional shop to have the mechanic disassemble, clean, or replace components. Never overlook this issue—safe driving should always come first.
