Formula Four Conical 54mm 99a Durometer:99a The Sonic is a lively

The Sonic is a lively fuller fish type model to be ridden a couple inches shorter than your regular shorty

The Don range has 3 models which fill all of these needs – The Don is stable on the nose

If you know Jack

Master surfboard craftsman Jeff McCallum translated his design prowess for the McCallum Quad

We make quality fins that will last for several years if properly maintained

Formula Four Conical 54mm 99a Durometer:99a The Sonic is a livelySpitfire Formula Four Urethane Wheels. 99A Durometer, 54mm x 32. 2mm. Conical Shape. A true performance conical shape. Hand cut for quick response and less weight. Spitfire Forumla 4 wheels feature unmatched abrasion resistance which equals fewer flat spots and smooth anti stick slide for more controllable grip and lasting speed.