Elastic rubber wheels feature a soft rubber tyre which provides shock absorbing for smoother travel.The ER1006-M20 by Richmond Wheel and Castor Co. is a 250mm diameter elastic rubber wheel that can safely take loads up to 250kg and has a tyre width of 50mm.This wheel is designed to suit 20mm axles and this wheel is available for the following alternative axle size: 5/8 inch (15.87mm), 3/4 inch (19.05mm).