The B17 is supposed to be _the_ randonneuring model. I wonder what the WSD difference is. Probably wider than the men's, and the men's B17 is already wide enough that people talk about cutting it down. I was just looking at these in the Nashbar catalog yesterday. There is some sort of narrow version. Then there are the titanium versions, which are ungodly expensive ($375 and up).
I was riding with a guy, during my 400k, who had a fairly new one (men's B17). He said not only did it get more comfortable from ride to ride, but actually during the ride it got better.
Nanci



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