Originally Posted by
datlas
Lower it ONE spacer. Get used to it. If you are able to, repeat every few weeks.
Put the spacer ABOVE the stem. Don't cut steerer until you are POSITIVE you like the new setup.
Also, if you are considering selling the bike, do not cut steerer as your slammed stem might not be attractive to some buyers.
Couldn't have said it better.
Make small, incremental changes. Ride. A lot. If your body doesn't complain, go lower. Repeat the process.
Don't cut the steerer until you can ride for hours at your desired height and you don't care about resale value of the bike.