Today Mrs. Newleaf and I picked up my recumbent and Mrs. Newleaf's fatbike from the LBS. We'll call it a semi-fail. The fat bike was supposed to go from 7 to 9 speeds and a 12-28 cassette to a 12-46. My recumbent was supposed to lose its grip shift in favor of thumb shift, which necessitated a new derailleur. I took them in before we headed out of state for a trip.
Unfortunately, some miscommunication seems to have occurred: when we arrived at the shop and the bikes were wheeled out, it was my recumbent which went from 8 to 9 speeds, from a 12-32 to a 12-46 cassette. That thing already climbed like a mountain goat. I'm happy to have an extra gear, but fear the 46 tooth may be overkill on a 20" wheel. On the other hand, the bike's long wheelbase means that now if it's paved and I can't climb it, it's only because the path has gone outright vertical

.
Mrs. Newleaf's fat bike went from a 12-28 to a 12-32 cassette, but stayed 7-speed. Turns out, when they emailed me about the 9-speed drive train, they referenced the fat bike while actually meaning to discuss the recumbent. The fat bike's hub design complicates the whole 7-to-9 speed transition. I'm happy enough with the bike's new cassette, if annoyed that its killer new drive train ended up on my 'bent.
That climbing monster 12-46 cassette looks a little odd on my 700c touring bike. In a 20" recumbent wheel, it's just...
Yea.
The drive train above was intended for this bike. Fortunately, the new cassette it actually received helped to shorten its too tall gearing.