I've been primarily a road cyclist ... but I live in an excellent location for mountain biking also, and I want to get started.
My questions are regarding fit. Will my road bike measurements translate directly to a mountain bike? I assume saddle height and setback from BB should be nearly identical? Reach and stack is where I'm really not sure. Since MTB handlebars don't have the "reach" of road handlebars, is there a way that people swag this measurement? It seems like you could measure from nose of saddle to "hoods" on your roadbike ... and come up with a close distance for flat mountain bike bars.
Also, is there any reason I can't use my favorite road bike saddle on a mountain bike? I run a Selle Italia SLR Superflow 145. The only downside is I might get a mud splash right on the center of my rear, in the cut-out?