I frequently build 650B wheels  and keep plentry of 650B rims, tires, and tubes on hand. The wheelsize has enjoyed something of a renaissance in the last few years but never went away for good reason.

You can find everything below in their respective component sections as well.  They’re only grouped here to make searching for 650B specific components a little easier.

Tires & Tubes

Gran Bois Cypres 650B $58	Col de la Vie 650B $25	Gran Bois Hetre (Red, Black, and White) 650B $62
Soma B-Side $45	650B Tubes $5

Rims

Synergy $63	Blunt $65	Twin Hollow $38
Dyad $65

650B Fenders

VO Zeppelin $55

Long-Reach Caliper Brakes Suitable for 650B Bicycles

Teltro R556 $55 (pair)

Dia-Compe Mod. 750 $55 (Pair)