4 Inch Rubber Casters & Wheels

Ratings on this page run from 125 to 500 lbs per caster, and the typical rating is about 300 lbs. To size a set, add the cart weight to its heaviest load and divide by one less than the number of casters. Uneven floors often leave one caster carrying very little, so that margin keeps every caster inside its rating.

Most 4 inch rubber casters here come in 1-1/4 inch or 2 inch widths. The narrower tread swivels with less effort on light carts and furniture. The 2 inch tread spreads the load over more floor, carries more weight and is easier on finished floors.

Durometer is tread hardness on the Shore A scale. Around 65 Shore A is soft: it cushions bumps and rolls quietly. Around 90 Shore A is firmer: it takes less effort to push under heavier loads and wears more slowly. Each listing shows its rating.

Most products on this page are rated from about -40°F to 180°F. A few high-temperature models are rated higher. Check the temperature range on each listing before ordering for cold storage or hot areas.

Most of the casters here mount with a top plate. The rest use threaded stems, expanding adapter stems for tube legs, grip ring stems, modular stems, hollow kingpin mounts and pipe thread stems. To match an existing caster, filter by plate size and bolt hole spacing, or measure stem diameter and length.

Choose swivel, rigid, swivel with brake or rigid with brake. A common cart setup is two swivel casters with brakes and two rigid casters: it tracks straight down an aisle and stays put when parked.