Moustache bars need a road stem 25.4mm or 26mm depending on the bar. The length is generally 2cm-3cm shorter for your stem length vs. what you use for drops. I have used those exact bars with suntour barcons for 1 1/2 years and they work great for me. I have found, per the Rivendell site, that they work best level with the saddle height or a bit higher so you generally need a longer stem than you are currently using.

My Trek 710 w/ said bars & shifters:

[IMG][/IMG]