I currently have a 4.7. and 5.5m sail and given that I'm 6'4" and 85kg-ish I figured a bigger sail would be useful. What size would everyone recommend, my current thinking is around a 7.5m as I would like to be able to get out in 15ish knots. Thoughts?

Knowing your board situation is critical for an objective opinion. A 2m jump in sail size is big and likely will not make sense regardless of the board or boards you have. However, if you want to plane in 15 knots with a 7.5, you will need a somewhat wide board between 115 and 130 liters. The type of board will also make a difference. A 6.5 sail is probably the most common sail size for intermediates covering 15 knots for lightweights to 20+ knots for heavyweights.

Yep, big sail small board is a bad combo.

If you like the gap between 4.7 and 5.5 the next size with the same gap is 6.4.

6.0-6.5 will get a lot of use in Melb if you have a big enough board.

Just gave that article a read, very useful information!

I do have an RDM, i believe 430. Will probably have to get a bigger mast with a sail upgrade.

Mmeyer said..
Just gave that article a read, very useful information!

I do have an RDM, i believe 430. Will probably have to get a bigger mast with a sail upgrade.

Severne Turbo 7.0 rigs on a 430 rdm

Also: www.windsurf.co.uk/all-a-quiver/

17-18 knots is the magic number - can still hold onto big sails, but can already get going on small ones.

So turns out the board isa~140L Fanatic Bee. Didn't realise it was that big, could be a bit rough out in the chop. Shouldn't have any issues with a bigger sail. Got me thinking though, maybe I should be thinking about a new board before more sails. Maybe a 105ish freeride or something. Thoughts?

You could use a 8.0 sail on that ...
but yes ...look for a smaller board ..105-115 ..but keep that Bee for your big sails ..
And a good 7.0 .-7.5 ..no cams are easier to use ...