Originally Posted by
Scrodzilla
This really depends on the geo/measurements of your frame. A 70mm with either bullhorns or compact drops on my Leader 725 is perfect for me. However, I do switch out the stem for a 90mm every now and again when I throw on a set of risers.
BTW - Thomson makes a 50mm stem.

I never mentioned anything wrong with a 70mm...but when your looking for a 50mm road stem, chances are you should get a smaller frame.