I bought a Niner RLT RDO gravel bike 3 years ago. I have 38mm gravel tires on the OEM wheels and bought a set of November RCG36 carbon wheels running Schwalbe Pro One 30mm for road riding. Works great in either configuration. November thoughtfully included some 1/4 mm center-lock brake disc shims, I added one shim to the Stans' hubs and the discs line up perfectly between the two wheelsets (the road wheels have DT Swiss 350s). Great way to go, and the gravel geometry is pretty close to endurance road bike geometry. I can feel a difference in the way the Niner turns vs my older Roubaix, but other than this the riding experience is pretty similar. Both wheelsets for the Niner are set up tubeless so I don't have to change anything in the saddlebag. Swap wheels and ride.