+1 on the Hutchinsons. They are the widest tires my Sweetpea frame
accommodates.
I also have Soma xPress on the Bleriot; like those as well, but the bikes have
different uses. The big miles happen on the Sweetpea.
Continental has also come out with a narrower 650b tire, but that's all I know
I'm the current happy rider of a Curt Goodrich-built Proto Saluki (my
friend from this list and I have already traded the bike back and forth
once between us) shod with Gran Bois 42s. It's a nimble and quick-turning,
and I'd like to play around with tire sizes a bit to see how "roady" I can
ri