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Seismic Speed Vents 73mm 77a Bubble Gum Defcon


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Seismic Skate Systems Speed Vent Defcon Bubblegum Skateboard Wheels – 73mm 77a (Set of 4)

The 73mm Seismic Speed Vent Skateboard Wheels are molded around a proprietary weight-saving Energy Conversion (EC) hub – arguably the most advanced hub on the market. The 73mm diameter gives this wheel the roll speed of a larger wheel, while the weight-saving hub 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 DH, GS, and beyond.

Note: Bearings not included.


  • One (1) set of 73mm Seismic Skate Systems Speed Vent Defcon Bubblegum Skateboard Wheels – 77a; includes four (4) wheels
  • Diameter: 73mm
  • Durometer: 77a
  • Color: Bubblegum
  • Contact Patch: 54mm
  • Offset bearing seat
  • Dual lip design
  • Defcon Formula: explosive speed and rebound with smooth, predictable grip-to-slide