Hi Naturel
I suppose you see already the Video of Steve Alen on the UltraSonic 147 with 9.7 Overdrive, can beat easy a Formula with 11 on reach in very light winds and get better and better when the wind pick up. For a 80 kgs rider is the best combination from 7 to 15 knots after with your 8.5 you can use it until 20/25 knots depend of your skill.
Have fun
All the best
__________________
Rémi
Can answer if you have any questions on this following boards :
Carve 111, 121, 131, 141, 151 & 161
Futura 93, 101, 111, 121, 131 & 141.
iSonic 80, 87, 90, 97, 107, 110, 117, 127 & 137
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UltraSonic 147
Formula Experience One Design
Phantom Race 377/320
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Phantom 295 :
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Formula 167 & 167 Wide :
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Racing Serinity Cat Concept
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