The Rocket Booster Modern Muscle wheel is specifically designed for fitment of modern muscle vehicles such as the new model '09-up Challenger, '05-up Charger, '94-up Mustang and '93-up Camaro. The "NEW" sizes for Modern Muscle are the 18x9, 18x10, 20x9, 20x10. The new Rocket Booster Wheels are precision-crafted from A356 aluminum and customers can choose from Hyper Shot, Gloss Black and Chrome finishes. The Modern Muscle Rocket Booster is compatible with Tire Pressure Monitoring Systems. The Modern Muscle Booster wheels are hub centric and vehicle specific hub rings(sold separately).