There is no difference between the size and spacing of the wheels you mentioned in the actual exercise process, but the difference lies in the difficulty. To put it simply, the big wheel is slightly more labor-saving than the small wheel, the wide wheel is better balanced than the narrow wheel, and the two wheels are more stable than the single wheel.

There is no difference between different types of abdominal chakras. It is very important to choose the exercise that suits you! Beginners are advised to practice in two rounds first. After the overall strength has a foundation and the joints are stable, you can choose a single wheel, because a single wheel is more balanced and coordinated with the body, which is relatively more difficult, and insufficient strength or coordination may cause injuries.