Supreme Suspensions - (4pc) 1999-2018 GMC Sierra 1500 2" Wheel Spacers 6x5.5" (6x139.7mm) with M14x1.5 Studs + 78.3mm Center Bore [Silver] FITMENT: 1999 - 2018 GMC Sierra 1500 (2wd + 4wd); does not fit Heavy Duty (HD) models CONTENTS: (4pc) Aerospace-Grade Billet Wheel Spacers with Precision-Machined Splined Studs, Installation Hardware, and Supreme Suspensions Pro Pack SPECIFICATIONS: 2 Inches Thick, 6x5.5" (6x139.7mm) Bolt Pattern, M14x1.5 Studs, 78.3mm Center Bore (Matches Vehicle Hub Diameter) BENEFITS: Positions your wheels 2 inches outward to correct tire rubbing issues, increase cornering stability, and allow for a more impressive stance; pressed studs eliminate the risk of vibrations INSTALLATION: Easy bolt-on installation takes just minutes with standard hand tools