This is Champion Wheel's new Rock Thrasher wheel. The outer ring features integrated "Rock Knobs," which are designed to protect the tire, wheel, and bead-lock mounting bolts. Champion says that these Rock Knobs offer added traction against rocks on the trail. Champion carries the Rock Thrasher already installed on American Racing 15-, 16-, and 17-inch wheels, or they can convert your existing aluminum wheels in two to three business days. Wheels are available in polished red, blue, black, or gold finishes. MSRP for conversions start at $234.95 for the 15-inch size, and complete wheels start at $331.80.