While many scoff at the idea of using only one gear, single-speed bikes have advantages. One advantage is that single-speed bikes can be safer for beginners, on top of being mechanically simpler, and, therefore, easier to repair. Single-speed models may also weigh less, which could impact performance, depending on what you’re doing with it. If you’re not tackling hills, and generally sticking to lower speeds, then a single-speed bike is even preferred.