I have a 1994 Cannondale Killer V900 mountain bike that I have set up as a leisurely/nature-seeing kind of bike. I am wondering what should be the proper width of my handlebar. I ride my road bike with 44cm handlebars. The current handlebar on the Cannonndale measures 66cm, and I am thinking to cut it down, as I just think it is too wide.

What size should I cut it down to? I sometimes mount panniers on the bike, if that may help you suggest handle bar width for me. And I also have bar-ends fitted on there for climbing leverage.

Thanks for all responses.