These are our standard 1.75" diameter Thumbwheels for Makos, Baby Orcas, and Mama Orcas standard chassis Adjustable Bag Riders.

These wheels have a 1-to-1 speed ratio. Each complete turn of the Thumbwheel raises or lowers the Foot by .1". There are twenty (20) detent clicks around the perimeter of the wheel. Each tactile and audible click changes the elevation by .005".

The threads are ACME 3/8"-10 1 Entry. Made from Aluminum 6061-T6, with a matte black hard-anodized surface finish.