It depends on the part. Where the fit comes down to a standard measurement — caster stems, base holes, armrest bolt spacing — a universal part is usually fine, and cheaper, if you measure first. Where the part talks to other parts — a standing desk’s motor, control box or hand controller — buy from the desk’s maker if you can; “universal” there is a claim to check, not a guarantee.
Parts where universal works. Office chairs share a handful of common sizes:
- Casters: most chairs use a 7/16 × 7/8 in (11 × 22 mm) grip-ring stem. In our chair casters and parts hub, the Lifelong, Omyoffice and RidRed OCW-004 sets state it; the Gvolatee states 11 × 22 mm; the MYNEEED set includes both 10 mm and 11 mm stems.
- Bases: the Frassie and MASTERY MART 28 in bases state a 2 in cylinder hole and 11 × 22 mm caster sockets.
- Armrest pads: bolt-on pads fit by the spacing between their screw holes. The Ketofa and Podoy in our armrest pads hub both use 4 in centers.
Parts where universal is a risk. A tilt mechanism must match the seat’s bolt pattern and the cylinder taper — the Skelang states a 10.2 × 6 in pattern and a 1.57 in cylinder hole, so measure both. On a standing desk, the motor, control box and hand controller must work together: the generic 24 V motor kit in our standing desk parts hub says it “fits most height-adjustable desk frames” but names no frame brand or model, and fits by an 8 mm or 6 mm hex hole; the Qurib actuator leaves compatibility with a given desk’s mountings and electronics unconfirmed. Are standing desk controllers replaceable? explains what to match.
When to go to the maker first. If the chair or desk is under warranty, a third-party part can void it — ask the maker for the part, which is often free. For desks, mixed electronics can fail to communicate; a matching motor or controller avoids that. The maker’s part also saves measuring when the model is still sold.
When universal is the better choice. Out of warranty, on a discontinued model, or for wear parts the maker charges heavily for — casters most of all. Measure the old part, compare with the listing, and check the stated load: five casters at the published weight per wheel should exceed your chair’s capacity with room to spare.
How to measure. Where to find replacement parts covers finding the model number and measuring stems and bolt spacing; what to do when a chair sinks covers the cylinder.
Last reviewed 13 October 2026