Description. The Black Rhino Cog is one of the latest styles with a unique chain like mechanical pattern that strongly blends a detailed lip with concavity for an ultra rugged looking custom wheel. It?s a five-spoke design with elements derived from the precision look of gears and cogs. The engraved recesses in each spoke give the right detail to suit the most demanding styles of trucks. The Cog has unique dimensionality with these details combined with aggressive concavity for the wider sizes. To cover the full range of stock and lifted off highway vehicles, Cog off-road rims are available in 17x9.5, 18x9.5, and 20x9.5 sizes. Offsets range from -18mm to +40mm for five, and six lug bolt patterns. These truck rims sport huge lips to provide safe bead seating for oversized tires.