70mm 4-PRESIDENT - 53mm Contact Patch / Happy Urethane - Yellow 86a. Designed for speedboarding, carving, slalom, commuting. Offset design with subtile lip characteristics for increase grip, speed and high energy. Designed to maintain grip. When desired they can be slid very predictably and smoothely to shed speed. These wheels will not slide right out of the box because of their grippy sharp edges. Repeatedly sliding wears down the sharp lips allowing for smoother slides. The 4 Presidents are a popular wheels for speedboarding on a technical quicker turning courses requiring the quick acceleration of a small wheel.