CASTER KIT PNEUMATIC 8IN/20.3CM

Here’s a detailed description of what an 8-inch / 20.3 cm pneumatic caster kit is — how it works, typical parts & features, advantages and trade-offs. I’m using a real example as reference: 8 in. Black Rubber and Steel Pneumatic Swivel Plate Caster (and similar).

means the wheel is air-filled (like a bicycle or car tire), rather than being a solid rubber or plastic wheel. The air-filled tire cushions impacts, absorbs shock, and provides smoother rolling on uneven surfaces.