Originally Posted by
Chombi1

My stems are quite low, but never slammed. All from getting used to laid out, flat back position riding I developed, emulating (at least, tried to.....

) the Guimard's Gitane pro team in the 80's
I've been always surprised though, that even at this low stem position, how I'm not that far from the minimum insertion line with most of my stems...
This is a nice example of a reasonable slopping top tine. A good rule of thumb is the rider should be comfortable in both the drop and upright position with a vertical or lightly sloping top line the line between the seat clamp and the center of stem with about a fist on the seat. post and 2 fingers on the stem. If its a lot different chances are the bike is too small or too big.