I found a frame for my granddaughter. It isn't a bmx, but anyway it has 24" wheels. (One is missing so I get to build a new wheel) I measured and the ISO is 520.
After I get the wheels done I'd like to find a nice, smooth tread tire. One also that will tolerate decent pressure. I've seen the Schwalbe but I don't want to go quite that skinny.
Thanks.