Originally Posted by
Newspaper_Nick
Double bolt option gives you complete freedom of skew adjustment of the saddle. You can fine tune the tilt. With single bolt, you are limited with the number of grooves chiseled on the seat post mount.
The double bolt post on the Roll I own would only let me tilt forward (down) a few degrees . Fortunately, it was just enough to get the nose of the saddle in the right position with a Brooks Imperial saddle . I’m not sure it would be enough with some other saddles I’ve own .