This Pearl/Adams wheel comes stock on all of their field frames. Put a set of these underneath your Adams marimba, vibraphone, xylophone, glockenspiel, or chimes and they'll glide across the ground with almost no effort.
This wheel features a strong locking mechanism to keep the frame from moving on slanted surfaces or when using a pedal, and it fully swivels 360 degrees to make navigation through cluttered hallways easy.