Originally Posted by
NormanF
650B is a medium width rim size that can accept wider tires. On a DF, the ride can be described as opulent. I have no idea how that would feel on a recumbent. The best advice is to experiment and see if you care for it.
I have a cheap DH snow bike with 700C that takes a 2.0 tire. If you have the room for a wider tire, I don't see why you can't get it in a 700C or a 26 - you just may need to look around. Like I had to to find the skinniest 26" and 20" tires I could get with a high psi capability.