How do I replace the casters on an office chair?

Caster replacement at OfficeFurniture2go.com is a standard maintenance item we support for all chairs we sell. Commercial office chairs use a 7/16\" or 10mm stem — both are near-universal and interchangeable across most commercial chair manufacturers. We offer soft-roll polyurethane casters (for hard floors), standard twin-wheel nylon (for carpet), and heavy-duty 75mm casters (for 400+ lb rated chairs). Upgraded casters are available at order or as after-market replacements. Call 1-800-460-0858 for caster replacement support.