Used google: search::: "isonic 105 site:gps-speedsurfing.com"
My last SB was a Is105... Did 1,5 yrs ago 72kmh almost 40kn topspeed on it. But recorded by Garmin Foretrex 201 (not really reliable).
In 20-25kn gusts when going downwind my speeds were around 35-37kn, on a 800m reach.
http://www.gps-speedsurfing.com/?mnu...70&StartRow=70
http://www.gps-speedsurfing.com/?mnu...70&StartRow=95
Other surfers have done well on Is101::::
http://www.gps-speedsurfing.com/defa...31672&uid=1045
http://www.gps-speedsurfing.com/defa...20577&uid=1475
http://www.gps-speedsurfing.com/defa...21302&uid=1261
Is101 does between 62-68kmh topspeed
I guess Is94 is better for speed use::::
http://www.gps-speedsurfing.com/defa...32923&uid=1049
Is94 does 73kmh