The two middle sizes, the W49 and W54, are designed for consistently fast runs throughout a wide range of conditions. These are the typical choices for speed riders on the tour. The largest size, the W58, is quite wide by speed-board standards. It is designed to deliver the highest possible top speed in relatively light wind conditions. The W44 is designed for one purpose in mind: the absolute highest possible speed on a windsurfer.
Ultimately the Starboard's fastest boards. For speed experts competing on the race tour, for GPS speed sailors and for Bjorn himself.
W44, W49, W54: constant vee bottom shape with 70cm flat, except for the W44 that has a 60cm flat / W58: double concave front section feeding into a vee tail. 70cm flat section.
The iSonic Speed Specials are built in a specially developed Speed Technology: a pure carbon construction with carbon overlapping-rail-wraps for maximum stiffness. No-paint finish on the deck and rails - for minimum weight
New insert positions give two extra-narrow stance options. The 2012 models also have only one row per strap instead of two rows - reduces weight.