My 11 yr old rides fairly comfortably in back, behind the passenger. It helps that my wife (passenger) is 5-1 so the seat can be moved forward to accomodate his legs. The wind usually beats him up pretty good, but with either top up, he really likes it! I'm afraid he will not be able to ride back there for too many more years... My eldest 6-1 and my youngest is headed for similar heights.