Swivel castors was a pneumatic wheel suitable for use on loose soil and uneven floors.

Soft tread wheels are kinder to floors and quieter in use but are not quite so easy to move from a standing start. For light, medium and heavy duty loads, soft tread wheels offer many benefits. Softer tread tyres are also particularly suitable for power towing applications. For very high load manual handling applications, soft tread wheels should be ruled out as, although they may be capable of carrying a very high load, the force required to move equipment from a standstill would require the efforts of several men.