What caster options are available for ergonomic chairs, and which do I need?

Standard ergonomic chairs come with hard plastic casters rated for carpet; you should swap these for soft polyurethane (PU) casters on hardwood, tile, or vinyl floors to avoid surface scratches. Oversized casters (60mm vs. standard 50mm) roll more smoothly on thick carpet and transition edges. Braking casters lock when you stand up and release when you sit, which is a useful feature for active users. Most casters use a universal 7/16" stem, making swaps easy and inexpensive — usually $15–$25 for a set of five. FindOfficeFurniture.com has ergonomic chairs and caster accessories — call 888-719-4960 for the best deals.