This can be a difficult question to answer, as the length of time a bike will last depends on a variety of factors, including the type of bike, use, and care. However, on average, bikes can last for between 2-4 years.If you notice any signs of wear and tear, it is important to take it to a bike shop for inspection. This way, you can be sure that the bike is in good condition and that any repairs or replacements will be done properly.