Ze_Zaskar said:
Well, this morning I tried a 110mm stem. The true is that I didnt feel very difrent. But afterall the stem had a very confortable extension.
Status: Really dont know...
Do you have another bike that you are comfortable with, if so, measure the top tube and stem, then add them together. Now measure the top tube of the Zaskar. Take the total measurement on the comfortable bike subtract it from the Zaskars top tube length. BAM!

that should be the approximate stem length you need.
Does that help, maybe not if this is you first bike?

Then it's trial and error.