Average car rims weigh about 30 pounds for just the metal, and another 27 pounds for the rubber tire, making the weight for the entire wheel about 50-60 pounds. Of course, this can vary depending on the size and material of the rims.
Any time you make modifications to your car, including non-standard rims, be sure to notify your car insurance company. Your car insurance company will want to know about these changes to ensure your vehicle is fully covered in the event of an accident. If your rates rise because of the new rims, it might be time to shop around.