Office Chair Replacement Base, 28" Diameter

Our 28" universal office chair base in black is in stock and ready to ship. Made from a durable black composite, this replacement five-star base fits a wide range of chairs—from those bought at office supply stores to other common office seating—delivering reliable stability for everyday use.

Features

• Diameter: 28 inches (five-star base) for broad, stable support
• Material: Durable black composite designed for long-lasting wear
• Universal fit: Compatible with most modern office chairs that use standard caster stems
• Caster stem compatibility: Supports standard 7/16" x 7/8" wire-grip casters
• Hub and height: Cylinder hub ≈ 50 mm (2") with an overall height of 3 1/3" (approximately 84 mm)
• Caster barrel diameter: 45 mm
• Cross-compatibility note: Works well with chairs you may have purchased at office supply superstores
• Availability: In stock and ready to ship
• Volume discounts: Email for a discounted quote (ORP121)

Benefits

Restore chair stability and safety with a single, dependable replacement part. The universal 28" base minimizes downtime by eliminating the guesswork of brand-specific parts, while the durable black composite construction stands up to daily office use. Its wide footprint helps distribute weight evenly across carpeted and hard floors, contributing to a steadier seating experience.

Ideal for:

• Facilities managers and office admins maintaining multiple chairs across workspaces
• Home offices needing a durable, easy-to-replace base that fits a variety of chairs
• Repair technicians seeking a versatile, ready-to-ship replacement part