Seismic Alpha Wheels 80.5mm x 60mm 76A set of 4. 80.5mm tall x 60mm wide DH Race: Superior top-end roll speed, traction, and braking power… with surprising quickness and agility for a wheel of this heft! A highly-optimized balance of properties for modern racing. The fastest urethane that the skateboard industry has ever seen, bar none. The largest and most supportive hub ever seen in a wheel this size. Size and momentum to carry you past the competition in straightaways, yet agile enough for quick acceleration, fast edge-to-edge adjustments, and snappy technical pre-drifts. Finely-calibrated width and supremely supported edges for smooth, predictable handling through even the hardest corners.