The Ryobi Electric Tools 089046001010 Wheel supports rolling movement for the equipment it is intended to fit. It provides a contact point with the ground, helping the machine move or be repositioned during handling and use. The exact application should be confirmed from the product's official parts information, as the supplied title combines chainsaw and concrete mixer descriptions. ... https://www.wholetoolbox.com/ryobi-electric-tools-089046001010-concrete-mixer-wheel/089046001010.html