Ladies bikes commonly have no top cross bar. You will need one to mount this bike rack, as it's important to secure the bike as high as possible to prevent movement. If your bike does not have one - simply buy an aftermarket cross bar online. They are around $50 - $60 and will connect between the handlebar head stem and the seat post so your bike can be secured into the rack. They are designed to be added/removed from bikes very quickly, so it's convenient to use.