Arbor Summit 78A Skateboard Wheels (Set of 4) Arbor's all new wheels featuring the "sucrose initiative" The Sucrose Initiative was developed for performance across a wide range of conditions Significantly improves slide and grip performance, while allowing us to deliver one of the longest lasting wheels on the market Arbor's new Groovetube core has a wider, "tube" profile which allows it to keep its shape for higher performance riding