Training wheels are a very useful tool for your kid in the process of learning how to ride a bike. These wheels are generally joined with the help of special clamps or bolts. Nevertheless, quick-release clamps seem to be more user-friendly, they are more likely to unfasten while riding, so the more reliable and secure option is using those fastening with bolts. As a rule, the lifespan of the training wheels is 4 years, but it highly depends on how often you are going to use them.