Info: Various Replacement Parts for Ball Chair
Replacement or supplementary parts are available for a Ball Chair like the one initially pictured (currently sold out), including the ball itself, various types of wheels, and height extenders.
Sitting on a ball can help take pressure off the spine, release muscle tension, correct posture, improve balance, and strengthen the torso.
Apart from use with ball chairs, these balls are also perfectly suitable as exercise/yoga balls.
These balls can be inflated up to ~52 cm (10.4 inches) in diameter. They're filled using a needle valve on a pump (not included), and come with a long stopper.
A number of wheel sets are available for use with the Aviva Ball Chair and comparable models including standard, free-rolling wheels. Also available are manually locking wheels -- depending on how the small tab is positioned, it either enables sliding/movement while seated, or the tab can lock the wheels in place to keep the chair stationary (two locked wheels suffice to hold the chair in place).
The auto-locking wheels (not pictured) are the ones normally sold with the Aviva chair. They are weight-activated to prevent rolling when you are seated, and the locks release when you get up, so the chair can be easily repositioned.
Set of 4 chair leg height extenders recommended for taller users or those sitting at a slightly higher desk surface. These 5 cm / 2 inch high extensions are for use with the Aviva Ball Chair, and will also fit the BalanceBall Chair from Gaiam. For additional pictures and information, please see our Ball Chair Height Extension Adjusters page.