Hey guys,
I've got a Trek 1400 that I came upon for a good price. I'm enjoying it so far, but I want to swap out my handlebars to a more comfortable shape. Ran into a little problem after I ordered the bars, as can be seen in the pictures. The circumference of the new bar is half an inch bigger than the existing bar and thus won't fit into the existing tube. Basically, my question is this: what other parts do I need to make this work? New fork and steering tube and related parts? Or could a threaded fork compatible piece be found? As you more experienced techs can tell by now, I'm totally new to this. I could wuss out and take it to the local bike shop, but I won't learn much by paying someone else to do the job for me, nor is that much fun. Let me know which direction I should go on this, please.

