The steady nature of the hydraulic pressure generated by the Bathmate series of pumps contributes to a faster increase in penile girth compared to length. This is because the surface area around the girth of the penis is greater than in length. As a result, the penis touches the sides of the pump, which means that the hydraulic pressure cannot further expand the girth. When this happens, the user can proceed to use an X40, but many X40 users have stated that the extra capacity for length expansion is not necessary, as they have not exceeded the length of the X30 or Hercules.

The Science: To achieve maximum hydraulic pressure, it is important to use the correct pump. Customers are always recommended to purchase a smaller pump (as long as their penis fits comfortably in it), as this will result in optimal hydraulic pressure around the penis. Using a pump that is too large will result in lower pressure around the penis, leading to slower or even no growth. This is where the demand for the HYDROMAX 7 WIDE BOY (X30 WIDE BOY) comes in. The Wide Boy has a wider capacity, but without an increase in length compared to the X30, maintaining optimal hydraulic pressure, resulting in faster growth.