Originally Posted by thebigmrT
caliper isn't always right due to human error(read: measuring in not the exactly center of the tube) we have a cool little tool to gauge the tube, it steps up, i think by 0.2mm and when it stops you know what size the tube is...so bring it in to a shop
Yes, the neat step gauge makes sizing a seat tube so much easier. But a person who can not size a bike's seat tube ID with a set of calipers should not be allow to touch such an instrument. There was a name for these folks, it is "Shoemaker". (no offense to makers of shoes intended)
note; there was never anything that would bar a shoemaker from owning a track bike.