Volk Racing GT30 The Volk Racing GT30 aggressive spoke design greatly enhances the performance look of any vehicle. Available size and offset combinations maximize lip area for show quality looks. As with all Volk GT series wheels, the GT30 is built using a seamless forged 2 piece design, consisting of the outer rim and inner face. The Volk Racing GT30 is available in a Formula Silver with a diamond cut center and in 19 in and 20 in diameters. Fitments are available for the 350z, G35 coupe, G37 coupe, G35 sedan, M34/45, BMV E90/92, Lexus, and any other vehicles that take similar fitments.