Seismic Alpha 75.5mm

£50 – £68

Sale!
Seismic 75 5mm Alpha Main
Seismic 75 5mm Alpha Side
Seismic Alpha Defcon Front
Seismic Alpha Black Ops Front
Seismic 75 5mm Alpha 78a Main
Seismic 75 5mm Alpha 74a Main

Seismic Alpha 75.5mm

£50 – £68

Looking to go fast – REALLY fast? The Seismic Alpha is the wheel you want. With Seismic’s high-grade urethane and a huge lightweight hub holding everything as rigid as possible, these things are going to be some of the fastest wheels you’ll ever ride.

Just don’t let that speed go to waste – couple the Alphas with some ceramic Tekton bearings to ensure the best possible ride.

Need bearings?

Tekton XT Packs

Seismic Tekton XT 7 Ball Bearings

If you'd had some Seismic bearings before, you know roughly what to expect here; Tektons feature a built-in spacer with a unique flange, locking the bearings together on the axle and restricting slop. No other bearing is this precise. However, these new XT Tektons have gone through a redesign, with thicker casings to reduce any flexing and make them even stronger and faster than ever.

Note that these may not fit street wheels due to the larger flange; wheels without cores often have oversized bearing seats which may obstruct the inner flange. If in doubt, contact us or use the Tekton Lites.

Tekton Ceramic Box and Bearings

Seismic Tekton Ceramic Bearings

These are bearings for people who like going fast. REALLY fast. These ceramic bearings are part of the combo which have broken downhill speed records. You might not notice any difference between these and regular Tektons rolling between rock-fakies and a tail stall on a mini ramp, but when you're pushing 60+mph, the extra speed and strength of ceramics will make a real difference. Couple them with the 75.5mm Alphas for one of the fastest combos you'll ever experience.

Like regular Tektons, these feature Seismic's built-in spacer with a unique flange, locking the bearings together on the axle and restricting slop. No other bearing is this precise.

Note that these may not fit street wheels due to the larger flange; wheels without cores often have oversized bearing seats which may obstruct the inner flange. If in doubt, contact us or use the Tekton Lites.

SKU: WHALPH Category: Tags: , , , , , , Product Brand: Seismic

Description

75.5mm tall x 62.5mm wide Alpha Wheels:

  • 62.5mm running surface
  • Bearing seat offset 6%
  • Square outside edge, straight-cut inside edge
  • 230g per wheel
  • Sold in sets of FOUR wheels

A highly-optimized balance of properties for modern racing. Welcome to a whole new realm of fast!

  • 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.
  • The very fastest urethane that the skateboard industry has ever seen, bar none.
  • Named after the Greek letter “alpha” (α), used in science to represent rotational acceleration.

Available in two proprietary formulas:

BlackOps™: Defcon™:
  • Comfortable and predictable on all pavements
  • Balanced rebound and grip
  • Extreme traction fresh
  • Buttery and smooth sliding broken-in
  • Thoroughbred race ‘thane
  • Guinness WR speed
  • Directional slide
  • Long-lasting grip
  • Slow, consistent wear

A giant step forward in race wheel engineering:

  • Stout S-shaped edge profile optimizes lip support, maximizes traction under extreme G’s, and ensures predictable slide initiation and hookup.
  • Running surface features a 0.5mm concave that pre-loads edges, heightens rebound, and enhances in-slide feedback.
  • Bearing seat offset 6% for progressive lip engagement and more consistent wear.

Debuting Seismic’s proprietary Fusion™ core:

  • 46mm tall x 44mm wide – the largest and most supportive hub ever seen in a wheel this size.
  • Deep, wide “saddle” profile minimizes lateral wheel flex, supercharges edge support, and ensures absolute mechanical lock with the urethane.
  • 8 lateral support beams (hollowed-out for lightness and aesthetics) form wide ridges that create unprecedented circumferential lock and rebound.
  • Robust bearing lugs.
  • 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.

Additional information

Weight 940 g
Dimensions 15 × 15 × 6 cm
Brand

Colour

, , ,

Diameter

75.5mm
Durometer

74a Defcon, 76a Defcon, 77a BlackOps, 78a Defcon
Suggested Use

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