oem 18s are 25lbs front and 27 lbs rear, oem 19s are about 2 lbs heavier... but you'll feel the difference in your acceleration and mileage. If you don't care about performance, get the breytons, but if you do care, driving with those rims will add the equivilent of 378lbs+ of sprung weight, which will be like driving with an extra 2-3 people in the car all the time...