100mm Fixed Top Plate Castor – Black Rubber Wheel, Roller Bearing, 80kg

For workshop trolleys, machinery stands and equipment that must run straight on a tough, quiet-running wheel, this 100mm fixed castor is a practical, economical choice. It has a black rubber tyre on a black polypropylene centre running on a roller bearing, and a rigid zinc-plated pressed steel bracket with a 105 x 87mm top plate that bolts straight to the underside of your equipment. Each castor is rated to 80kg and stands 128mm tall. It suits the fixed end of workshop and tool trolleys, warehouse and stockroom trolleys, machine and equipment stands, and workbenches.

Why it works

Black rubber tyre – quiet, grippy and hard-wearing

The black rubber tyre (hardness A85) absorbs small bumps, grips well and runs far more quietly than a hard nylon or steel wheel. It copes with temperatures from -20°C to +80°C. Black rubber can leave dark marks on pale or polished floors, so for hospitals, shops and clean areas choose the grey or blue non-marking versions instead.

Roller bearing for easier rolling

The wheel runs on a roller bearing rather than a plain bore, so it takes less effort to start and keep moving under load, and it wears more evenly over time.

Fixed bracket for straight-line tracking

A fixed castor does not swivel, so it keeps a trolley running straight and stops the back end drifting. Fitting two fixed castors at one end and two swivel castors at the other gives a trolley that tracks straight but still steers easily. The 105 x 87mm plate has four 8mm holes on 80 x 60mm centres and suits M8 bolts.

• Black rubber tyre, quiet and hard-wearing
• Fixed (rigid) bracket, runs straight
• Roller bearing, 80kg per castor, 240kg for a set of four
• 105 x 87mm top plate, M8 fixings
• 128mm total height

Where it's used

The fixed end of workshop and tool trolleys, warehouse, stockroom and garage trolleys, machine and equipment stands, and workbenches. Best on concrete, sealed concrete, resin and other hard floors where occasional tyre marks are not a concern.

Choosing the right option

Choose black rubber, as here, for quiet, grippy running on workshop and warehouse floors; choose grey or blue non-marking rubber where floor appearance matters, and polyurethane for heavier industrial loads. Check you have a flat area at least 105 x 87mm under each corner for the plate. For a trolley, pair two of these fixed castors with two 100mm black rubber swivel castors, or the 100mm black rubber total lock castors if it must stay put; all three share the same 128mm height, so the trolley sits level. For the load, add up the weight of the item and everything on it and divide by three rather than four, because on an uneven floor one castor is often lifted; if the answer is over 80kg, choose a larger wheel.

Installation, use and care

Hold the plate flat against the base and fix it through all four holes with M8 bolts and nuts. Fixings are not included. Line both fixed castors up with the direction of travel so the trolley runs true. Check the fixings after the first few weeks, keep the wheel clear of threads and debris, and wipe clean with a damp cloth. Keep the rubber tyre away from oils and solvents, which can soften rubber.

Frequently asked questions

Will the black wheel mark my floor?
Black rubber can leave dark marks on pale or polished floors, especially when turning under load. For those floors, choose the grey or blue non-marking versions.

Does this castor swivel?
No. It is a fixed castor that only rolls forwards and backwards. Use it with swivel castors at the other end so the trolley can still be steered.

What size bolts do I need?
The plate holes are 8mm, so use M8 bolts and nuts. Fixings are not supplied.

What is the load capacity?
Each castor is rated to 80kg. A set of four is rated to 240kg, because the load is calculated on three castors to allow for uneven floors.

Ordering and delivery

Sold individually, so order the number of castors you need. Delivery charges are shown at checkout.