These skate wheel adaptors have a diameter of 1 inch, a width of 0.32 inch, and utilize the 0.77 inch hub pattern. These adaptors allow you to attach the 2.975 inch or 4.90 inch skate wheels to 0.25 inch drive shafts.
Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be intuitively connected together. The wide range of components makes building complex electromechanical prototypes or finished projects a reality.