Solid rubber bead measures approximately 1" in diameter
Fits 13" to 14" tires
Works on all styles of wheels
As tire inflates the rubber bead slips to the top of the wheel
One piece rubber "o" rings that fits over the rim between the bead and the rim flange, making a seal which allows the tire to be inflated. Even the toughest beads fall to this 'o' ring.