After dialling in my silver bullet 72 with a 40cm mfc slalom fin Im looking for advice from other SB 72 owners on there fin choice for this board.
Im 100 kg and using 7.5/8.6 free race sails, I feel I can go smaller and will be chasing the top speed of this board in choppy ocean conditions.
I didn't get the original fin when purchased but im believe it may have been 36/37cm?
Older threads on the SB's don't refer to experimenting with fin sized designs.
Select to expand quoteSTUMP said..
After dialling in my silver bullet 72 with a 40cm mfc slalom fin Im looking for advice from other SB 72 owners on there fin choice for this board.
Im 100 kg and using 7.5/8.6 free race sails, I feel I can go smaller and will be chasing the top speed of this board in choppy ocean conditions.
I didn't get the original fin when purchased but im believe it may have been 36/37cm?
Older threads on the SB's don't refer to experimenting with fin sized designs.
I use my WTs in lake chop.
I can't speak for the larger size you have but when I 1st got my WT64 ( 112ltres) I tried the 39cms pointer I usually used and the board actually foiled for 10m..
This was back in prefoiling days..
It came down and kept going ok but after that I went smaller.
WT64 - 35cms tectonics Weed Demon - expensive but works great!
For my WT57 I bought WT weedies and they are perfect!
I find the Wt's need smaller fins and for my weight ( 66kgs) I like the weedies to settle them.
24cm WT stealth weedy for 12 -20 kts - 7.2m - 6.5 - 6.2 - 5.7m then 20cms WT Stealth weedy for 20 - 25kts.5m - 4.5m
Once it's 24kts plus the chop is usually getting pretty big and the board too fast . I used to change to my 85ltre WT but I've got too heavy and it's now a sinker. 
It has a very narrow tail area.
I have never had any control issues using the WT weedies or the tectonic..
I blast upwind and they are fantastic for doing bearaways. Could be an issue getting hold of them now..
Thanks Sue,
It just feels like it wants to go a few knots quicker, if I had a smaller tuttle id just try it and see?
I don't want to drop dollars on a quality fin until I can get some feedback on what size/design I can get away with.
Using it with larger sails mostly in chop, only allowing very minimal flex on the tailplate.
It could very well be me holding it back but be interesting to see what others are using.
Understand it not the fastest board out there but for its ability to motor through swell fully powered up( and comfortable) it will be in my quiver for a long time to come.
Hey stump ,I don't have the same board but also 100 ,kgs my 73 I use 2 fins .the 40 for 8,0 ,8,6
Then I go straight to the 37 carbon fin .6,5-7,5 ,if buying 1 more fin a 37 sounds about the right size .
Select to expand quoteSTUMP said..
Thanks Sue,
It just feels like it wants to go a few knots quicker, if I had a smaller tuttle id just try it and see?
I don't want to drop dollars on a quality fin until I can get some feedback on what size/design I can get away with.
Using it with larger sails mostly in chop, only allowing very minimal flex on the tailplate.
It could very well be me holding it back but be interesting to see what others are using.
Understand it not the fastest board out there but for its ability to motor through swell fully powered up( and comfortable) it will be in my quiver for a long time to come.
Interesting, as a lightweight I tend to use full tail flex unless it's light and flat. I use it to make it comfortable, safe for deep bearaways and slow it down when things get hary.
Most heavier guys don't seem to use much.
