As post reads, I just ordered a new Uni and KH Free Ride saddle 2009 and I’m not sure if they are compatible.
The Uni is a Nimbus Muni 24 Inch .
http://www.unicycle.com/shopping/shopdisplayproducts.asp?id=1&subcat=10&cat=Intermediate&L2=Rough+Terrain&L3=Intermediate
and the seat is here:
http://www.unicycle.com/shopping/shopexd.asp?id=1370
After looking at it, doesn’t seem like they are compatible. ?
Nimbus seatposts use the standard 4 bolt pattern, so yes, they are compatible.
The only unicycle seatposts(that I know of) that are not compatible with the KH seat are the Miyata and the 2-bolt Thompson type used with Scott Wallis carbon fiber seatbases.