The R415 by Richmond Wheel and Castor Co. is a rigid frame castor and uses a nylon wheel. This rigid castor is part of our heavy duty welded series range and has a top load capacity of 300kg. The R415 uses ball bearings for wheel rotation. The rigid frame of this castor only allows linear movement unless used with swivel castors. The outside diameter of the nylon wheel is 100mm, the wheel width is 35mm and can be ordered separately (NY413).