I am glad I found this site.I live in Missouri and plan on a father son build with my 13 year old.He is only 4'10" now and the specialists tell us he will always be a small guy.Therefore I'm wanting to build him a 20" bike so he can reach the ground easy.I have restored a few muscle cars and a half dozen harleys so I feel I'm up to this challenge.Well glad to be here and know I will learn a lot.