Aero 50 Series AEROBrite Chrome roll-formed race wheels shine brightly on the way to victory lane. 50 Series wheels are ideally priced for the weekend racer and feature a 2 piece steel construction, knife-edged safety bead humps, maximum-sized bead seats, lower runout, and an HSLA material D-window center. In addition to a corrosion resistant finish, the 15 x 7 50 series wheels are DOT- approved while the 15 x 8 wheels are approved for IMCA sanctioned races.