Office Chair 5-Star Base with Caster Wheels – Universal Replacement (680 mm)

Replace a cracked or broken office chair base with this sturdy 5-star base. It comes fitted with five smooth-rolling caster wheels and takes a standard gas lift cylinder, so your chair is stable and mobile again in minutes.

Features

• Strong 5-star design for a stable, balanced seat
• Heavy-duty black nylon body with reinforced arms
• Comes with 5 twin-wheel caster wheels fitted
• Standard 50 mm centre hole fits most office chair gas lifts
• Easy fitting: push the gas lift into the centre hole, then fit the seat

Dimensions

• Overall diameter: 680 mm
• Height with wheels: 110 mm
• Centre hole diameter: 50 mm
• Caster wheel diameter: 50 mm
• Arm thickness: approx. 25 mm

Before ordering: check that your chair's gas lift fits a 50 mm centre hole.

Gas lift cylinder sold separately.

Frequently Asked Questions

Are the wheels included?
Yes. The base comes with 5 twin-wheel caster wheels already fitted.

Will this base fit my chair?
It has a standard 50 mm centre hole that takes most office chair gas lifts. The base measures 680 mm across.

Is the gas lift included?
No. The gas lift cylinder is sold separately.

How do I fit it?
Push the gas lift into the centre hole of the base, then fit the seat on top of the gas lift.

Need the cylinder too? See the hydraulic gas lift (245 mm) and the tilt mechanism plate, or browse all office chair spare parts.

Sold by The Royal Safe Company — office furniture maker since 1934.

• Feet flat on the floor, knees at about 90° — check the seat height against your desk.
• A mesh back keeps you cooler through long working days.
• Use tilt-and-lock to recline on calls and sit upright to focus.
• Armrests should let your shoulders stay relaxed.