Quote Originally Posted by khgulledge
if the saddle itself is the same width as my outside-outside measurements, does anyone think it would be supportive enough?
Nope. What LisaSH said. There is a metal support running along the rear curve to which the leather is bound. Sitting on that metal isn't going to be the best choice. A B17N is gonna be NARROW. A B17 or B17S might work better as far as getting the full benefit of a leather saddle. Tell Bill or Diane at Wallingford your measurements and talk to them to get a good saddle choice.