I've been describing the Mercedes-Benz SL550 Grand Edition's pillowy-comfort yet ride-quality soundtrack to the screeching and rapids of the 4.7-liter twin-turbo V-8. JWHEEL designed and equipped alloy rims wrapped around a 19-inch front and 20-inch rear wheels. It's a luxurious experience, with clean, powerful wheels matched with a Benz sleek body that's crisp and attractive. If you are someone who likes fine details and wants to have wheels that fit the R231 generation SL-Class, then JWHEEL aluminum alloy wheel is the one for you.