Wide in the middle.
Wide in the tail.
Pulled in nose.
Double barrel concave.
Concave in nose section.
This board is the ultimate small wave basher. It’s state of the art design covers 80% of surfing, from waist high to 2′ overhead. It can be blown up for the biggest XXL guy that rides a 10′ log and wants to ride a “shortboard”.
The 4 fin placement is crucial as the water flowing between the fins is like a fuel injector.
The advantage over a thruster is that a quad doesn’t have a fin stuck in the center of the tail, and it makes it turn quicker and goes faster.
With two fins on the rail, you have more holding power for bigger waves. With two unique wings it gives this quad a large range in wave size.
The bottom is a single to double concave with vee on the tail with low rocker. Joe Blair is a pioneer in quads. He has been shaping and refining this model for the last 25 years.