It has 3 inflatable wheels with a diameter of 25 cms. It is an extremely versatile stroller. It can be used from birth to 4-5 years of age. It is a twin stroller and we can decide if we want to use it with one or two children. The lower seat can be removed with one move and it instantly turns into a single stroller. It is easy to handle, it is very manouverable, you can push it with one finger. It folds easily, the wheels can be removed with one move. It is a sturdy stroller, perfect for the city.