One of the nice things about being your own builder/brand is that you can build whatever you want for yourself, sellability be damned. And, while he probably could sell as many as he could make, Tom Ritchey built this fillet brazed show version of the P-650b as a one-off for NAHBS (and, likely, for his own use). The ones you and I can buy are standard tig welded.
Just visible at the top/left background is the 650B/700c breakaway tandem is inching closer to production, they’re mainly just finalizing the bags that the frame will go into.
More pics, plus 650B wheels and tires, below…
The Ritchey Z Max Evolution mountain bike tire is now coming in 650B size, available in spring. $69.95, weight TBD. 27.5×2.1.
The 650B wheels are shipping and available now. The WCS Vantage Alloy are 1587g and retail for $799. These wheels are mounted to their WCS carbon rigid 650B fork, shown better in the complete bike photo at top, which is also available now for $499. 615g claimed.
The XX1 driver body will ship in a couple months for all of their compatible wheels. Check this post for more details on which brands are offering XX1 hub kits.