I've got a set of WTB i40 rims laced to Shimano boost hubs with a microspline freehub. 15x110/12x148. 6 bolt. Spin straight and hubs are smooth. Came off my Surly Grappler. No issues, I just upgraded my wheels. Setup tubeless with tape and valves. Have 50% life set of Teravail Ehline Tire. 650b.