Measuring seat tube c to c would mean measuring from the center of crank 'bolt' to where the seat tube/ top tube meet (at the center) - measuring along the ST. If it's a compact (sloping TT) frame, you'll need to specify that and/ or measure to the 'virtual line' (where the ST/ TT junction would be if the TT were horizontal). You need a level (or straight edge) running parallel along the TT to get an accurate measurement for this.Jos123 said:What is the top tube length c-c of the bike and the seat tube length of a bike?How do i find this out? I'm trying to resell a bike and i've recieved this question.
I did a quick google search and didn't find any, but (generally speaking) bikes of that era were pretty square, meaning that a 52cm frame size would measure close to 52cm's in both seat tube and top tube length. This was true of my '84 Bianchi Limited.Jos123 said:its a 1984 bianchi. Idk if they'd have the charts.