Millennium Gripper Hilo Set Hilo Set - 4 80mm and 4 76mm Wheels HiLo set includes 4 76mm and 4 80mm Wheels. The wheel by which all other wheels are judged, the original dual durometer. We combine our specially formulated highest rebound urethane around our flex-tech core for max grip and then surround that core with our exclusive specially formulated rebound urethane to create the worlds best selling hockey wheel.