White Knight 606-2 Aluminum Alloy 4 and 5-Lug Universal Wheel Spacer, (Pack of 2) 5 millimeter thick Inner diameter: 3.09 inches, 78.5 mm Outer diameter: 5.67 inches, 144 mm Fits: 4x98mm - 4x120mm, 5x100mm - 5x115mm Fits: 4x4.25" - 4x4.50", 5x 4.25" - 5 x 4.75"