Quote Originally Posted by elk View Post
I assume with the B67, you can set it back farther with rail to spare?

Do you have a photo of yr B67 on the rails? (don't you have that yummy Rivbike?)

This is the best I can do:
In this first picture, I have the B17S on, and it's pushed as far back as the rails allow:
http://harmonias.com/LisaBike_7.jpg
You can see that the S is a short saddle. but look where the back edge of the saddle is- it's directly over the rear brake pads.

Now here is the B68 (non-S):
http://harmonias.com/208.jpg
The back edge of this saddle as you can see, hangs 2-3" further back behind the brake pads. It too is shoved all the way back on its rails. But the rails are way longer so the saddle can go further back. It's also a longer saddle. (and wider for my sitbones, which is why I went with the B68).

(Please pay no attention to the cockeyed handlebar position in the second phot- it was a weird experiment and I have since changed my handlebars to ones that feel much better for me. )

Hope this helps a bit.