Brake cables are used for braking on a bike that has cable-pull brakes. Over time, brake cables will stretch and require adjustment or replacement; they can also become damaged. It’s crucial that you inspect them regularly and replace seeing signs of wear and tear. Brake cables and hoses are made up of an inner wire and an outer housing. When buying replacement brake cables check the length of cable or housing on your bike and ensure that you purchase the correct length. If you are using hydraulic disc brakes you will need to buy brake hoses.