Want to give your truck a more aggressive, wider stance? These JiiinMiiin wheel spacers can help. This is a set of four 1/2-inch thick (that's 12mm) spacers. They're hub-centric, meaning they center perfectly on your hub, and they fit three common 8-lug bolt patterns: 8x165.1mm (also called 8x6.5\), 8x170mm, and 8x180mm. The hub bore is 127mm, and the outside diameter is 210mm. They're made to push your wheels out just a bit, which can improve the look, help prevent tire rubbing on suspension or fenders, and accommodate wider wheels. They fit a huge list of trucks and SUVs from about 1988 up to 2019 – including Ford F-250/F-350, Dodge Ram 2500/3500, Chevy Silverado/Sierra 2500HD/3500HD, GMC, and more (check the detailed list!). Installation is pretty straightforward with basic tools, but SAFETY IS KEY: you MUST torque the lug nuts/bolts to your vehicle manufacturer's specs and re-check the torque after driving 25-50 miles. Make sure your stock studs are long enough and you have fender clearance. A popular mod for truck owners.