cheers ben !
[sorry about the lines through this , crew …I don’t know WHY that happens , even after 22 MONTHS of it ?!]
these are just my thoughts and findings , by the way …others may vary …
" “Answers: i’m about 5"8, at 140 pounds”
at that size , I think a 5’10 x 20 x 2 1/2 would be plenty of board for you . Depending on the waves you will be riding , of course…
14 nose , 14" tail ,
tail width tip to tip …dependent on if you want curve [a twin FIN setup] or a relatively straight tail [a twin KEEL setup]
nose rocker and tail rocker a bit more than a “standard twin keel” if you are used to going vertical [yes?] on your thruster.
Flatter rocker if you want to trim more , and draw longer more drawn-out turns on a twin keel , and also helpful for flatter waves .
This was the reason I was asking what sort of waves you will mainly be riding it in ?[strike]
a 20" width will go rail to rail quicker than say a 22" wide one , and feel less like a kneeboard.
your thruster , would it be around 6’1 x 18 1/4 x 2 1/8 or 2 1/4 ? close ?
so , obviously , a 20" width on a “fish” will ALREADY be 1 1/4 " wider than the average modern thruster , and at 2 1/2" minimum thickness , it will be at least 3/8" to 1/4" thicker than a thruster.
A lot of fish rails seem very thick / eggy / blocky , too , compared to a thruster’s rails . These will tend to sit higher in the water , and be harder to bury in a turn , so you might want to think about having fairly fine [thinnish] rails , it’s easier for us lightweights to turn the board that way ! [for the record , I am 5’91/2" and 154lbs. And I am 45 years old . I ride both a 5’8 and a 5’11 fish …the 5’11 is 20" wide and 2 1/2" thick .]
Anyway , I hope this helps !
ben [/strike]