My Bilenky tandem isn't a conversion, but rides on Hetre tires. I've gotten really spoiled riding on these tires. I'm looking for something else to convert to 650B, but with 650A (EA3) being as affordable as it is, it is hard to justify. The Panaracer CdlV isn't a Hetre, but might fit the bill nicely. I have a Dawes Galaxy frameset sitting in the basement and a pair of freshly built CR-18 650A rims laced to a SA 3-speed hub. This might just be the ticket.


Bilenky 650B Constructeur Tandem - First Ride - 20 by Sallad Rialb, on Flickr