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The 2006 Cadillac STS Base fits 17 to 22 inch wheels that are 7 to 9 inches wide with an offset between +30 and +50, on a 5x115 bolt pattern.
The 2006 Cadillac STS Base came from the factory with 235/50R17, 235/50R17 up front and 255/45R17 in the rear, 255/45R18, or 235/50R18 up front and 255/45R18 in the rear tires, depending on the wheel package.
70.3mm
Lug Nuts
M12x1.5