There are lots of different rumors about the weight of the front seatings.
I read in one forum : 31,48kg each one. But one friend from an Italian forum weighed the seating and the result was almost 34 kg (75 lbs!!) each one.
The performance ones seem to be lighter : around 24,5 kg each one (54,4 lbs).But from a German catalogue it seems that they declare only 3 kg less (6,6lbs) for each seating. I think we need an help for the translation from a German friend...:-)