Seismic M40526

85 mm high x 52 mm wide SPEED VENT wheels. Offset bearing seat 49 mm contact surface - rounded outer edge, beveled inner edge. 8.6 ounces. BlackOps offers the ultimate balance of speed and grip with extreme traction. Fresh - buttery smooth and supple, well broken-in - comfortable and predictable. Defcon Guinness WR speed, groundbreaking slide - durable grip - slow, even wear. Premium Clear - the best, beautifully clear urethane on the market, smooth, fast, and grippy. The fastest wheel on the planet - used to set multiple world speed records, including Pete Connolly's impressive record of 91.17 mph / 146.73 kph (September 16, 2017, at the Top Speed Challenge in Quebec, Canada) and Mischo Erban's official IGSA standup record of 80.83 mph / 130.08 kph (September 30, 2010, in Northern Colorado). The 85 mm x 52 mm Seismic Speed Vent is shaped around our patented Energy Conversion (EC) hub - the first large, wide hub in longboarding and unmatched to this day. The 85 mm tire provides downhill speed while the weight-saving hub offers the quickness and agility of a smaller wheel along with improved rebound. Combined with lips designed for pure grip, the Speed Vent is in a class of its own.