It looks like there at one time was rubber around it but most that fell off when it came from the dirt. Bear with me I'm not that good at a tape measure. But I think these are the measurements 1/2" wide. Like the top. One side to the other is 5 1/2 with out the rubber and then from top to the spoke 3/4". Does this sound at all right. Sorry never have used a tape measure much. Lol