Kizer anti-rocker Sliders 45mm

Kizer Sliders are fast and long-lasting grind wheel

The Slides are the new anti-rocker wheels from Kizer. Injected from the longest-lasting, most durable, and fastest material available. The Sliders feature a unique shape that makes wheel bites almost impossible. Made by injection molding carbon-fiber-reinforced nylon, these Sliders are made for one purpose only: grinding. They are available in 3 different sizes, 49mm, 47mm, and 45mm.

(The above product description is provided by the manufacturer.)

Sometimes the wheels are called "Kizer Sliders Superfluid" too.