Keep Your Fingers Safe from Wheelchair Spokes. Getting fingers tangled in the wire spokes of a wheelchair is painful! Spoke covers are the answer for the high-risk user. The foam disks are covered with fabric, shielding the user from the potentially dangerous spokes. Disks attach in seconds with integral hook and loop fasteners. Edges are overcast for long life. Black. Pair. Attach in seconds. Fabric covers. Hook and loop fasteners. Sizing: Measure diameter of hand rim (length of spokes from one side of rim to opposite side). Small fits up to 20".