The Hobie 18 has been built in many configurations since its introduction. Follows is the "short" history of the differences.
- Hobie 18 Standard... clear anodized aluminum.
- Hobie 18 SE... Black anodized aluminum, color tramp and sails.
- Magnum Wings... welded frame, length of tramp area.


- Hobie 18 Magnum... add (welded frame) "Magnum" wings (1984-85 ish).
- Hobie 18 Formula... made in Europe. 1 1/2' taller mast, Mylar main and jib.
- Hobie 18 Formula... Made in the US. Standard Hobie 18 with white powder coated aluminum.
- SX Wings... Riveted wing assembly, long seat ring oval. Seat extends forward of the front x bar and aft of the rear, nearly to the transom.

- Hobie 18 SX... Euro Formula design rig with US made SX (long ring) wings.
- Formula 18 (F18) Design class built to a "formula" made by many manufacturers. Hobie Tiger, Narca F18, Inter 18, Capricorn, Dart Hawk, Cirrus, Flyer, Twister