100-C Classic Series Chrome aluminum car wheels licensed from American Racing (wheel design is a trademark of American Racing LLC). High quality one-piece cast aluminum alloy rims. Triple chrome plated (Copper, Nickel and Chrome). Rim Size: 17x9", Wheel Lug pattern: Ford's 5x4.50" (same as 5x114.3mm), Wheel offset: +12mm, Wheel Backspacing: 5.50", Center bore size: 73mm, Required lug nuts (not included): 1/2" R.H. acorn (conical seat)