Originally, bikes were designed with two different-sized wheels in order to accommodate a wider range of riders. A larger wheel provided more stability and power for taller or heavier people, while a smaller wheel was more efficient and easier to maneuver for shorter or lighter people. However, over time it was discovered that having two identically-sized wheels provided the best overall performance for all riders, regardless of their size or weight. This is because a bike with two identical-sized wheels is easier to balance and steer, and it also...