These are likely non-slip rubber feet or furniture pads.
Specifications
- <ul><li><strong>Material:</strong> Often CNC manufactured nylon (PA6G) or high-impact rubber/urethane. </li><li><strong>Drive Wheel Dimensions:</strong></li><li class="ql-indent-1">Diameter: Typically around 130mm (approx. 5 inches). </li><li class="ql-indent-1">Width: Often 55mm wide. </li><li class="ql-indent-1">Bore/Shaft hole: Common sizes include 24mm or 19mm, some with an 8mm keyway and a set screw. </li><li><strong>Tracking and Idler Wheel Dimensions:</strong></li><li class="ql-indent-1">Tracking wheel diameter: Around 102mm (approx. 4 inches). </li><li class="ql-indent-1">Idler wheel diameter: Around 50mm. </li><li class="ql-indent-1">Width: Often 55mm wide. </li><li class="ql-indent-1">Bearings: Typically use 3x 12mm bearings. </li><li><strong>Skateboard Wheel Dimensions (alternative use):</strong></li><li class="ql-indent-1">Diameter: e.g., 76mm. </li><li class="ql-indent-1">Width: e.g., 53mm. </li><li class="ql-indent-1">Durometer (hardness): e.g., 78a (soft). </li></ul><p><br></p>