Used to set four World Speed Records, including the Official IGSA standup record of 80.83 mph (130.08 kph), set by Mischo Erban on Sept. 30, 2010.
The 85mm by 52mm Seismic Speed Vent is molded around their proprietary weight-saving Energy Conversion Core. The 85mm diameter gives it the roll speed of a downhill wheel, while the weight-saving core adds the quickness and agility of a smaller wheel, as well as enhanced rebound. Combined with lips designed for pure grip, the Speed Vent is utterly unique among high-end wheels. Breakthrough performance for longboarding, downhill, GS, and even Hybrid slalom.
Specs: 85mm tall x 52mm wide -- Offset bearing, dual lip design. High-rebound, weight-saving vented core - in colors/durometers listed below.
Sold in sets of two wheels for duro mixing convenience. For highest performance, use a softer duro at the tail (where thrust is generated and grip is most critical) and a harder duro at the nose (to optimize roll speed).
Available in the several colors/duros (see current choice options above) and three proprietary formulas –
BlackOps™: ultimate balance of speed and grip • extreme traction fresh • buttery and smooth broken-in • comfortable and predictable
Defcon™: Guinness WR speed • directional slide • long-lasting grip • slow, consistent wear
Premium Clear™: the best beautiful clear urethane on the market • smooth, fast, and grippy
About Seismic Wheels: Pure grip at its finest, with superior wear characteristics. The wheel of choice for the world’s most discerning racers – including the 2006 World Slalom Champion and the 2007 IGSA World #1-ranked downhill racer – along with countless longboarders, cruisers, and classic rippers! All Seismic wheels 77A and above are now poured in a revolutionary new urethane compound, code named “Black Ops”. The best, bar none. It offers more grip and rebound together, with less rolling resistance, than any other formula ever! Industry-leading core technology makes our big wheels surprisingly lightweight, with supercharged inside edge rebound. (Courtesy Seismic Website)