Colors: Black, Bolt Circle: 5.00" Wheel Size: 15" X 9.50" Back Spacing 4.50" Since November 1997, AERO's NASCAR wheel has won more Cup, Busch and Truck races than all other brands combined. New for 2006, this series also meets or exceeds SFI 35.1 specifications for wheel testing. AERO has also added a Hunter Engineering rim measuring machine. Each wheel is tested and marked before it leaves our door. We also have the only wheel on the market with the E-Coat Process which is heat resistant and acts as a heat shield. The "E-Coat Process" also helps prevent equalization of the tire and inner liner normally caused by paint peeling and rust. Champions choose this CNC spun formed wheel for our quality control standards. Wheel weighs 27lbs. WC wheels also available.