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  • Seismic Skate Systems Alpha 75.5mm
  • Seismic Skate Systems Alpha 75.5mm
  • Seismic Skate Systems Alpha 75.5mm
  • Seismic Skate Systems Alpha 75.5mm
  • Seismic Skate Systems Alpha 75.5mm
  • Seismic Skate Systems Alpha 75.5mm
  • Seismic Skate Systems Alpha 75.5mm

Alpha 75.5mm

$97.00
Excl. tax

Seismic Skate Systems 75.5mm Alpha Downhill Longboarding Wheels

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The Deep, Deep, Deep details.  The ones that make us love the dudes at Seismic's attention to every detail in all their line of products.

75.5mm tall x 62.5mm wide ALPHA Wheels
62.5mm running surface • Bearing seat offset 6% • Square outside edge, straight-cut inside edge
8.125 oz. each • Sold in sets of FOUR wheels

A perfect balance of optimal properties for modern competitive racing: size and momentum to carry you past the competition in straightaways; finely-tuned width and supremely supported edges for smooth, predictable handling through even the hardest corners; and the very fastest urethane that the skateboard industry has ever seen, bar none.

A giant step forward in race wheel engineering. The Alpha’s stout S-shaped edge profile optimizes lip support, maximizes traction under extreme G’s, and ensures predictable slide initiation and hookup. The running surface features a 0.5mm concave that pre-loads the edges, heightens rebound, and enhances in-slide feedback. The bearing seat is offset 6% for progressive lip engagement and more consistent wear.

The Alpha™ also marks the debut of Seismic’s proprietary Fusion™ core – at 46mm tall x 44mm wide, the largest and most supportive hub ever seen in a wheel this size. Features include a deep “saddle” profile, 8 perpendicular support beams (hollowed-out for lightness and aesthetics), and robust bearing lugs. The Fusion minimizes lateral wheel flex, supercharges edge support, and assures absolute mechanical lock with the urethane. Formed from 85D fiber-reinforced thermoplastic – the toughest hub material in the industry.

Finely Tuned Durometer Choices!

 76A Mango Defcon: Vice-like grip and very snappy directional slide, with plenty of slowdown power. Ideal for aggressive racing.
• 77A Blue BlackOps: Sticky and predictable “in the pavement” slide. Perfect for rough and inconsistent pavement.
• 78A Mint Defcon: Very stiff edges that give loads of grip with a friendly slide and crisp hookup. Ideal for smooth roads and lighter riders.

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