Absolutely nothing cause it sucks ass having 2 kid seats in there. Need a real good reason to have to pull the baby seats out cause it tends to make me angry. I'm not the most patiant person. Made up two lockable alloy boxs that live in the tub. Same height and width of the wheel tubs. One has tie downs and fork chock for the bike the other has the jack and other bits that used to live behind the seat.