Seismic Skate releases new 80.5 mm tall ALPHA Wheels in two widths – the 60 mm wide DH Race for fast downhill skateboarding and the 55 mm wide LDP Trim created for long distance pushing.
Both wheel models feature DEFCON™ high-rebound urethane formula in either 76A or 78A durometer and Seismic’s Fusion™ core. Let’s take a look at the specs…
The 2019 Seismic Alpha Longboard Wheels
The ALPHA Longboard Wheels are technically two different wheel models that share the same components but a different shape adapted to the discipline of longboarding they are best used for.

The ALPHA DH wheels are 80.5 mm high with a 60 mm running surface, a 6.5 % offset bearing seat, square outside edges and a straight-cut inside edge. Each wheel weighs 9.125 oz. or 258.689 grams.

The ALPHA LDP Trim wheels with an 80.5 mm height and a 53 mm contact patch feature the same 6.5 % offset bearing seat, beveled edges and a weight of 8.75 oz. of 248.058 grams each.

What joins these two models is Seismic’s pride and joy, their core, and urethane formula. The Fusion™ core is a 46 mm tall x 44 mm wide supportive hub with 8 hollowed-out support beams and a robust bearing lug made from durable 85D fiber-reinforced thermoplastic and surrounded by their DEFCON™ urethane in one of the two durometers mentioned above.
In an interview at the ISPO Longboard Embassy Seismic claimed their new DEFCON™ is faster than their BlackOps™ formula and proudly mentioned Pete Connolly’s Guinness World Record where he reached 146.73 km/h (91.17mph) rolling down on Seismic wheels at the L’Ultime Descente in Canada.
Shop Seismic Longboard Wheels
Seismic Alpha 75.5mm Longboard Wheels 77a Blue
Fastest Urethane formula in skateboard industry, Straight-cut inside edge, Predictable handling
Stout S-Shaped edge profile, DH/Cruising wheel.
Amazon.com
Seismic Alpha 75.5mm Longboard Wheels 77a Mango
Fastest Urethane formula in skateboard industry, Straight-cut inside edge, Predictable handling
Stout S-Shaped edge profile, DH/Cruising wheel.
Amazon.com
For more info about the Seismic ALPHA Longboard Wheels visit seismicskate.com.
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