Longboard fin placement plays out a bit differently. Making fin changes as small as a quarter inch can make a big difference. If you’re more into nose-riding, then you should move the center fin back a bit to encourage stability. A single fin placed too far forward will cause some spin-outs. This is why you will see longboards with single fins positioned further back than the center fin of a three fin system. Single fin surfboards are better for nose-riding because they encourage gliding in a straight line. Smaller outside fins encourage directional change, making it more difficult to ride the nose.
Three fin longboards are more versatile than single fins. If you’re surfing smaller waves, then you should move the center fin forward to loosen up the surfboard. When placing surfboard fins, if you’re looking for extra hold and longer arcing turns, then moving the center fin back is your best bet. You want to avoid using too large of a middle fin or you will create too much stiffness and drag.