acceleration? You mentioned in a previous post a concern about acceleration because of the extra weight of the wheel. All wheels are different and the weight of a replica could be as much as 6-8 pounds heavier as opposed to a forged wheel. It is really hard to tell. Do check your gas consumption since installing the new wheels. That would be a better indicator than the "butt-o-meter". They look great, enjoy! Jr. '89 535iA I love my new wheels!!! Its like having a new car. I've received a lot of compliments. They turn heads on the road! The car turns much better as well.