Tires with thicker beads may require the use of shims to ensure the beadlock ring is properly seated against the face of the wheel. This ICON Alloys 15” Beadlock Shim Kit includes .090” thick aluminum shims that can be installed to fit tires of various bead thicknesses to the 15” UTV Compression beadlock wheels. Proper use of beadlock shims will also reduce stress and fatigue on the ring bolts.