What size steering wheel should I use?
Dometic does not make specific recommendations regarding steering wheel size, except that the wheel is at or below the maximum wheel diameter noted for each type of helm and that the wheel is sized/located so it can be rotated freely by the boat operator through the entire steering arc with no obstruction or hindrance to movement. Wheels in the 14" diameter range are used widely with mechanical steering systems. Any size wheel may be used so long as the helm's recommended maximum wheel diameter is not exceeded and steering effort is acceptable.
An equidistant-spoke steering wheel is suggested for hydraulic steering systems since a certain amount of oil bypass in the helm will gradually result in the wheel becoming un-centered when the engine/drive/rudder is in the straight-ahead position. Again, please note the maximum wheel diameter recommended for the helm.