Hi I'm Tracy, I have joined this trials forum on behalf of my son William, who has caught the trials bug from his cousin. He would like a bike for Christmas and this site looks very informative, i don't know a lot about this sport so i thought i should do a bit of research as to which bike is going to be best for him, William is 5ft tall and very keen (he has taken the seat off his normal bike and is leaping off anything he can find!!) ( one worried mummy!) would be grateful of some helpful advise to start us off, he has talked about a onza pro, his cousin has a onza bird but he wants to upgrade it for something lighter. thanks Tracy