Rocker has a LOT to do with paddling AND driving down the line.
I have a 7,2 big guy tri that is 2 and 3/4 thick, 20 wide, with about a 13 inch nose and 14 inch tail. I had it shaped by a friend who is outstanding. What I failed to notice, when I picked up the blank at Mitch’s, was that the blank was custom ordered in a Hawaiian rocker. Not good for paddling into mushy waves. The shaper pointed it out, right before he cut, so I just told him to go ahead.
Now, my 6,10 Rusty Pirannah has a 14.5 inch nose, 21.5 inch middle, 15.5 inch tail, and is 2.6 inches thick. Plus, the thickness does NOT carry out to the rails. Therefore, the 7,2 i just mentioned has more volume AND more floatation. However, the Pirannah paddles in much easier because it has such flat rocker and is wider.
The 7,2 only worked well once. The surf was about 7 feet, very hollow, but makeable. I made the best backside turn of my life on that board, but every other day was not very good.
So, to me, rocker is religion. I don’t think anything can fix bad rocker. And I don’t like rocker, not on shortboards or longboards. I really like to keep it under four inches on anything, and on longboards even shorter.
Tail rocker, on the other hand, is different.
These are my opinions, of course, and not correct for anyone else necessarily, but they are for me.
I might custom order a fish, because it will be cheaper, but I really want one for this summer, so I’ll probably buy one. I found a ton of 5,10s (the original size, I believe) and some others up to 6,2. My goal is a 6,4.
If you really want to see what a fish can do, get the video called Longboard Fever. It shows Joel Tudor surfing a real fish at Cardiff Reef on a 6-7 foot day. He is backside, or course, but is just cruuuuuuuuising on the thing. Total figure eight cutbacks, vertical off the lips, beautiful bottom turns, floaters, the works. He is soooo smooth on it.
Too bad his fishes go for 750. But I won’t complain about his prices. I learned not to do that.
I think that I can pick one up for about five hundred or so. It hurts, but I must feed the addiction.