Originally Posted by
Runner13.1
I have read that you should go down 2cm from road bikes to track bikes as a rule of thumb. Is that typically correct?
No. This is old-fashioned and debunked convention. If you plan on racing track, there's a strong argument for choosing a longer top tube than you would on a road bike. IMO a good rule of thumb to start is approximately the same top tube or reach as your road bike.