There are a few reasons why modern bikes generally have two identically sized wheels. First, it provides a more stable and comfortable ride. When both wheels are the same size, the bike is less likely to wobble or shake. This is especially important when riding at high speeds or over uneven terrain. Second, it makes the bike easier to transport and store. When both wheels are the same size, the bike can be easily placed in a car trunk or storage area. This is not possible with bikes that have different-sized wheels, which tend to be more difficult...