To inspect the belt, rotate the rear wheel and check the inside and outside surfaces, looking for cracks, missing teeth, tears, or holes. A few nicks in teeth or minor fraying along the edges is normal and nothing to worry about, but major damage means it’s time for a replacement. Next, take a look at the pulleys. If they’re chromed, you want to ensure that the material isn’t flaking off since that serves as a hard, durable coating. Otherwise, you’re just looking for uneven teeth, chipping, or other signs of wear.