Groovy Pushrim Covers are meant for quadriplegics because of the improved grip. They are also designed with grooves or treads which increase surface area, which makes it easier for quadriplegics to push the wheelchair. Imagine having a tire on your pushrims. It can also be used by anyone who needs improved grip on the wheelchair. Use of wheelchair gloves are recommended for this product because of the increased friction. Groovy Pushrim Covers are available in 24 inch as standard and other sizes upon request.