I have a Brooks B135 saddle with the double rails. The stock "friction discs" are worse than useless for heavy riders - sit on the saddle wrong & it tilts fore and aft. I've stripped the stock 13mm nuts, installed a larger bolt & nut, nothing works - the problem is the limited contact area of the friction washers.
To get away from the stock clamp, I've bought a "seat sandwich" from Harris Cyclery that allows the saddle to be mounted on any single-bolt seat-post. So far, I've tried the saddle on a Kalloy and a similar post, but there is a problem. Although the saddle no longer slips, it is impossible to get the saddle level. Even at its tilt-limit, the nose of the saddle is slightly higher than the rear. When I say "slightly," I mean "just enough to be uncomfortable."
So my questions are two:
1. Is there a way to modify the seat post to allow for a more nose-down position? And if not -
2. Is there a brand of single-bolt seat-post that will allow more fore-and-aft tilt than "normal?"
Thanks - FH