C Drive Fins

I see some solutions:
- twin fins with a trailer. The MR has very good grip at low speed, the AM has a better profile at more speed.
- keels, quite efficient in very small waves, especially with symmetrical profiles, with a trailer maybe. Can be cumbersome if waves hollow.
- C-Drive, excellent grip at low speed while staying nimble in the power, so they work even if the conditions change during the session (tides)
- Quobba, definitively the fastest solution, but in weak waves you will need to use also the rail if you want to push hard on them at low speed, they have less holding power at low speed than the above. However, if you can pump them into speed on weak waves, they are incredible, especially with a light board which then seem to motor
- (not tested) if you have future boxes, fins that give you no toe-in riptidefins.com/ they are reported to be great for weak waves

But these will be marginal gains compared to a dedicated short and wide board with a fast rocker...

Seajuice said..
Try just using the 2 sides only. Then the centre trailing only. Then use the largest possible trailing fin that resemble a centre box fin about 5 to 7 inch if possible.

It wont work, I've tried.

You will get faster speed in a straight line, but the board will loose so much drive that pumping will become inefficient.

A 7'6" 5.5kg board is a pumping machine, good fins you can leverage on to push on your pumps is what will give you the speed, taking advantage of the light weight. And going straight is not an option, a light board will be stopped by any chop.

If you have Futures style boxes, you can try Riptide Fins. They take the "toe in" out of the boxes making the fins straight as JP does with all their boards. This makes for instant speed in those weaker waves. If you go this route try using a slightly smaller center fin. This has worked really well in my smaller, low volume boards.