Castor wheels are the swivel wheels on manual and powered wheelchairs. They are available in various different sizes and styles. In a lot of instances the dimensions of the castor wheel are written on the side wall of the tyre. If there are no markings on the tyre the castor will have to be measured to identify a suitable replacement.
How To Measure A Castor Wheel
The three measurements needed to identify a castor wheel are, overall diameter of the wheel (including the tyre), width of the tyre and width of the hub. The diagrams below show what these dimensions are.
With these measurements you can now find a suitable replacement castor wheel. Please note it may not always be possible to purchase the exact original equipment castor wheel. In these instances it is recommended to replace the pair.