Use this tool to compare stems http://yojimg.net/bike/web_tools/stem.php
The dirt drop stem comes in 80 and 100 extention forward, but the 80 has 90mm quill height above line, and the 100 has 155mm of quill maximun. I don't know what a Chtystem is in dimensions, but you must, so compare the 2. You will find either dd stem will have less reach, becsuse they are at a +35 angle and not -17, assuming that is what your stem is. So the dd stem jacks up a lot more than forward. The graphic tool is very helpful for visualizing. As far as how high, that is all up to you, positioning rules are for fools ! -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.