Pressed Steel Swivel Castors with Red Thermoplastic on White Nylon Wheel - 80mm-150mm

Which size swivel castor do I need for my trolley or equipment?

The right size depends on two factors: the total weight you need to move and the clearance height available beneath your equipment. As a general rule, divide the total load by four (the number of castors) and select the variant whose per-castor rating comfortably exceeds that figure. For lighter trolleys and furniture up to 270kg total, the 80mm castor is ideal. For loads up to 330kg, choose the 100mm. For heavier equipment up to 480kg, the 125mm is the appropriate choice, and for the most demanding applications up to 540kg, the 150mm variant is recommended. A larger wheel diameter also rolls more easily over minor floor imperfections and reduces operator effort.

Are these castors suitable for use on hard floors such as concrete, tile, or vinyl?

Yes. The red thermoplastic wheel on a white nylon centre is well suited to smooth, hard floor surfaces including concrete, ceramic tile, vinyl, and sealed timber. The 85 Shore A tread hardness provides a firm, durable rolling surface that resists flat-spotting and wear under regular use. These castors are not recommended for soft or uneven outdoor terrain, deep pile carpet, or heavily textured surfaces where a softer rubber wheel would be more appropriate.

How do I fit these castors to my equipment? What fixings are required?

All four variants use a standardised 4-hole top plate measuring 100mm x 85mm. The plate features dual hole-centre spacing of 60mm and 80mm, with a hole diameter of 10mm, making them compatible with a wide range of existing equipment and trolley frames. You will need four M10 bolts, washers, and nuts per castor (not supplied). Simply align the plate holes with the corresponding holes on your equipment, insert the bolts, and tighten securely. No specialist tools are required beyond a standard spanner or socket set.

What is the difference between a swivel castor and a fixed castor, and which should I choose?

A swivel castor, such as those in this range, rotates a full 360 degrees around its vertical axis, allowing the equipment to be steered and manoeuvred in any direction. A fixed castor, by contrast, only rolls in a straight line. For most trolleys and mobile equipment, a combination of two swivel castors at the front and two fixed castors at the rear provides the best balance of manoeuvrability and directional stability. If you require full multi-directional movement — for example, in a confined space — fitting four swivel castors is the preferred approach.