I am looking into bikes for my niece who is almost 5. I was hoping to find something that is lightweight and good enough quality to be passed along to her younger sister. I was looking at this http://www.harobikes.com/bmx/backtrail-z16.php It says it is 22 pounds, which doesn't seem that light to me, but much better than some others I've looked at. I also am considering specialized hotrock 16", anyone know a weight on that model? Thanks!