Hmmm.

I think the "narrower hips" thing might be important here. At 5'11" and 170 American Obesity Units, I'm not what you'd call "lightly built," but I also don't really have anything anyone would describe as a "curve" unless they were being Pointlessly, Purposefully Pedantic. (Which is fun, and I'm a fan, and no shade.)

Where I'm thinking that this shows up in saddle fitting is that I'm starting to think that I might prefer a Brooks one "size" smaller than you'd expect if all you had was my measurements and a picture of the bike. (All equivocations intended.)

I also prefer the flatness of the B17's "seating area" to the rounder Pro profile. (Pro-file?) At least on a road bike. There's not much in it, but it's there. I think the Pro might work well on my mountain bike... the curved rear should allow my to throw my hips around more. (Such as they are, and what there is of them... see the top of this post for excessive detail that you already know if you've read this far, so why did I bother typing this in the first place?)

Further confirmation of my thesis might be found in the observation that my favorite plastic road saddle is the Rolls, and my favorite MTB perch is a Concor. (Flites and Rocket Vs work decently in both roles.)

It's fun to experiment.

--Shannon