More miles per hour, distance per push, and blocks per watt! The worlds fastest urethane and most progressive hub-and wheel engineering bring unparalleled rebound and superior energy efficiency to a huge 90mm-diameter shape. Higher top speeds, longer push distances, and extended ESK8 battery life and riding range! Next-level weight-saving Turbine hub features bigger vent holes for more accessible e-board pulley adapter fitting. Hub structure ingeniously sculpted for highly-optimized routing of wheel rebound energy. Width, edge profiles, and bearing seat offset finely calibrated for race-style grip and more consistent wear. Half-millimeter concave running surface preloads edges, sharpens grip, enhances rebound