Bonzer: Originally designed by the Campbell brothers and refined for many years by Mike Eaton, the bonzer is one of the most complex surfboard designs ever offered on a production level. The double concaves shaped into the tail area can be used in conjunction with a multitude of templates and bottom contours. The bonzer concaves work in conjunction with short, angled ventral fins placed at the outside edge of the concave. a short raked center fin is also used.

Purpose: The Venturi principle is applied to achieve greater speed and acceleration. The ventral fins are essential to control water flow and enhance maneuverability.