Gear Alloy Big Block 20 Black Wheel / Rim 6x135 & 6x5.5 with a -44mm Offset and a 108 Hub Bore. Partnumber 726MB-2126844 Gloss Black with CNC Milled Accents Gear Alloy 726MB BIG BLOCK wheels/rims 20"X12 Get away from the 'stock look' with these 20" custom Gear Alloy aftermarket wheels to enhance your vehicles ride. Buy with confidence from Hubcap, Tire & Wheel who have been in business for almost 30 years.