Originally Posted by
aramis
I've noticed that many track bikes fit smaller than their top tube seems to indicate.
A couple reasons for this:
1. They have a steeper seat tube, so if you set up your saddle in a neutral position in the seatpost, it will be further forward than a similarly neutral position on a road bike.
2. They have a short headtube and low toptube, since some (well, the good ones) are designed to let you set up a kilo/pursuit position. So you need some stem rise.