The wheels on your BMW 635csi rotate its tires properly. More importantly, however, to get that result, BMW 635csi wheels are designed to keep friction low while adding leverage. They spin around your sedan's axles; meanwhile, your tires contact the pavement, which creates friction for turning. They then add that extra force, not only helping your car move but also keeping it moving. BMW wheels come in various sizes to do that job depending on model, running from 15 to 18 inches. Some even reach 19 to 20 inches or more. They're also comprised of different materials, but generally, any BMW wheel is either steel, aluminum alloy, or carbon fiber. Wheel styles and wheel colors vary also. Wondering what wheels your car needs? The good news is that factory BMW 635csi wheels take much of the thought out of figuring it out. They're custom-fit to your model, not to mention color-matched. It's a good idea to stick with OEM wheels for any replacement project, too. That's because the correct wheels for your BMW 635csi help ensure proper wheel alignment, acceleration and braking normally, dependable handling, even the right speedometer calibration. Replace yours if they're the wrong size, not fitted right, dented or cracked, or if their rims' edges are bent or broken. Ordering genuine replacement BMW 635csi wheels online directly from us is as quick and easy as a few clicks!