I'm looking at a purchase of a vintage road bike that has 26" wheels as common in the 1940s. The question is about sizing. my current steel bikes are 21.5 and 22" centre to top. A bike I'm looking at is 23" and built for ols 26x11/4 wheels. Because I'm not sure about BB height on these old things. I bought a tandem in my size not realizing that they have high BB's so standover is very snug. For the record I'm 5'8"