Good morning, bikers. I just bought a 1971 Schwinn Super Sport for my son, and this will be his first road bike (what a clever way to feed my vintage habit). Iím planning to put the original steel Schwinn parts into storage, and replace them with alloy parts. The seat post appears to be steel, so I want to get an alloy post. Would anyone know what the diameter would be? (the bike hasn't arrived yet) Also, does anyone have any experience with the BMX US-to-European bottom bracket converters? Thanks.