Upgrade your Cal 20 rudder from Gresham Marine and start winning races today. Gresham Rudders provides big advantages in the way the boat feels and performs. All slop is eliminated and rudder shape provides minimum drag and no vibration. Gresham Cal 20 rudders weight in to minimum weight and can be ordered with either a tube top or yoke type tiller. Gresham Blades for the past 6 years have won many Senior, Women’s and Junior National Championships. Gresham Marine also provides Yoke Tiller or Round tillers. Contact us for price.