Healthline Trading wheelchair wheel accessories – replacement wheels for wheeled chairs. Comparable to Drive, Medline and Invacare Wheelchairs. The measurements of the wheel are 8 inch by 1 inch. The solid steel alloy provides durability and high control while maneuvering. This flat free caster wheel has 5/16″ bearings and weighs 2.1 pounds. This steel alloy wheel is a premium replacement option for worn original manufacturer equipment. You can purchase one or a pair at a better price.