I don't know the answer to your question; I've only ridden the towpath on my mountain bike.
But I wanted to mention the towpath yahoo group, if you haven't found it already. You can get lots of information from the folks there.
http://groups.yahoo.com/group/coTowpath/
Good luck!
- Gray 2010 carbon WSD road bike, Rivet Independence saddle
- Red hardtail 26" aluminum mountain bike, Bontrager Evoke WSD saddle
- Royal blue 2018 aluminum gravel bike, Rivet Pearl saddle
Gone but not forgotten:
- Silver 2003 aluminum road bike
- Two awesome worn out Juliana saddles