Biggest sail on the FT-138

[Terje]

Hello all,

Last year, I go for a FT-138 and a 8,4 sail to ride in the the light
wind.
I really enjoy this combo which get me on the planning in 10kts of wind
(I am 68 kg).
But it seems that this board can handle a bigger sail and it could make
me ride in the 7 to 12 kts that usually blows on my lake in summer.
Which size of sail would you recommand ?
I was thinking of a 10,5 freerace.

Cheers,

Terje