6'0 single fin bottom shape help

General Discussion
1

I just finished shaping a 6’0’’ x 19 1/2’’ x 2 1/2’‘. 15’’ nose/tail. the rocker’s fairly flat. It’s got a pintail and Im probably going to use a 8.5’’ fyre flex fin on there with the box 5’’ from the end of the tail. Im making it to surf some clean big fast down the line type waves. I been doing quite a bit of research on the forum searches, but I still can’t decide what to make the bottom shape. I was leaning towards a slight double concave to spiral vee, but I’m not too sure how well that would hold in overhead+. Can I get some help on this?

thanks!

-tony

2

Single to double works very well but vee to double goes great also. just go mellow though on the depth and you’ll be fine.

3

when you say vee to double. do you mean double to vee? if not how does the vee to double work?

4

How big waves?

What kind of rails?

Check out the Machado single fin Merrick does. That bottom works good in waves up to head high or a foot or two overhead.

5

wave size : headhigh + biggest I can paddle into with a 6’0

rails: down rails

on the merrick single fin, I was inspired to do something similar to that design. I was wondering what kind of bottom that board uses? I ve been searching forever without success online. I’ve ridden a 6’0 flat bottomed one, it was ok…only if it was shoulder + and clean. I have a shallow single to double 5’8 keel fish that I love the rail to rail pumping action.

6

The main bottom feature in Merrick’s “Rob inspired” single fin is two deep concaves (spiral vee?) that run off the tail with a hard, untucked all the way around a full rounded tail. Full down rails, wide, flattened rocker. Wide point forward. You could use a fish blank. A 6’0 would be about 20 inches wide… maybe a hair less. Stiff, slightly raked, but long single fin. A glass-on would be sweet, but Merrick puts in a box. Check the MSF and the MSFG2 on the channel islands website.

7

thanks for the help! I already stripped a larger older retro board and shaped the board a few days ago, I have about 19.5 wide and 15’’ tail and nose, just the right amount before it’s too thin. Everything’s pretty much shaped besides the bottom shape. I was leaning towards the 2nd generation of the msfg’s. I got some spare glass and epoxy, so the board’s probably gonna cost 60 bucks at the most, el cheapo for the win!

8

Right on…

The 2nd generation looks like fun. Same bottom as the first generation, but pulled rounded pin and pulled nose… a bit narrower, too, but still wide. I think 19.5 will be a good width for you…

…and glass that fin on!