Originally Posted by DaveSSS

Rather than an inseam measurement, measure your actual saddle height to pick the best stack height to produce your desired saddle to bar drop, without a lot of spacers or a high rise stem. There's a big difference between a properly measured cycling inseam and a pants inseam. I never know which might be used.

With a 73cm saddle height, I look for a stack height in the 520-530 range to produce a maximum saddle to bar drop of 10cm. Changing from a -17 stem to a -6 will raise the bars by about 2cm.