Info: Set of Four 5 cm (2-inch) High Extensions to Insert the Ball Chair Wheels Into
Info: Set of Four 5 cm (2-inch) High Extensions to Insert the Ball Chair Wheels Into
These extensions are for use with the original Aviva Ball Chair we formerly sold here at Aviva (one is pictured on our other Ball Chair Accessories page), and will also fit the similarly shaped BalanceBall Chair from Gaiam and the Evolution Original Stability Ball Chair.
These ball chair leg height extenders are recommended for anyone over about five foot six, so as to maintain an appropriate angle between your hips and the knees (which should be slightly over 90 degrees), or for those using a ball chair to sit at a slightly higher desk or table or counter surface.
These risers add two inches to the base when they're snapped into place, so while the top of a well-inflated ball on a standard chair might be about 23 inches from the ground while on the casters alone, it would sit 25 inches high with these extenders in place.
They come in a set of four, and have the right inserts on top to fit into the frame of the chair (including a metal one which swivels) and the correct opening on the bottom to snap the ball chair casters into.