Description: Make your Audi stand out from the pack with this matte black- machine-polished- cast aluminum 21in alloy wheel in a handsome ten-spoke design. Please note that Audi Genuine Accessories recommends a 285/40/21 tire. Wheel measures at 21in tall by 9.5in wide- with an offset of 31. Make your Audi stand out from the pack with this matte black, machine-polished, cast aluminum 21-in. alloy wheel in a handsome ten-spoke design. Wheel measures at 21-in. tall by 9.5-in. wide, with an offset of 31.