I've got an older model Cannondale CAAD 8 frame that I'm trying to build. I need a seat post and was measuring the inside diameter of the seat tube, but my calipers are screwing up on me, giving one measurement one time and another the next. I'm pretty sure it is either a 27mm or 27.2mm but I need to be sure.
Does anyone have one like this Cannondale and can tell me for sure? Thanks