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Sector 9 Race Formula 70mm Longboard Wheels

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yellow (78a)
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  • Set of 4 Wheels
Ride Style
  • Downhill
Core Placement
  • Centerset
Wheel Edge
  • Round Lip
Surface Type
  • Smooth
Wheel Features
  • Race Formula
  • 78a
Ride Style

Downhill - To go fast and stay in control, you want a big wheel with a lot of contact with the pavement.

Core Placement

Centerset - The hubs in these wheels are set equidistant from the lips, resulting in an even wear and a controlled slide.

Word to the wise: They can be rotated (like your car's tires) to promote even wear and a longer lifespan.

Wheel Edge

Round Lip - Breaks traction more easily and offers smoother transitions from grip to slide. Round lip wheels are generally preferred for freeriding.

Surface Type

Smooth - The natural shiny finish provides extra grip for railing corners and is more responsive when pumping/carving compared to wheels with a stone ground finish.

Wheel Features

Race Formula - This is Sector 9's fastest and most evenly wearing urethane compound.


78a - The most common durometer we see amongst cruiser wheels. They have great grip for cornering and easily roll over cracks, small rocks and the like.

Diameter (mm):70.0
Width (mm):46.8
Contact Patch (mm):42.0
Suggested Riser Size (in):1/2+
Overall Rating
Reviewed by 1 customers
So awesome !!
by Joel Rivera in Brooklyn, NY (Verified Buyer)
Posted on 9/28/2021
Sector 9 Race Formula 70mm Longboard Wheels - white (75a)
Very comfortable ride
Like riding in a Mercedes
Great on sidewalks
0 person has found this review helpful