Reserve rims offer the perfect balance of width and wheel size. The rim beads on the Reserve rims are thick, the material saved by optimizing the placement of the spoke hole reinforcements went directly into the bead, making it extremely strong without adding weight to the overall construction. The beads are hookless: this makes for a better fit with modern tires, but also simplifies manufacturing, which results in more consistent carbon compaction the technical way to say stronger rim. Backed by Santa Cruz lifetime warranty Carbon fiber construction Includes rim tape and tubeless-ready valves Specifications Brake TrackNoneColorCarbonDefined ColorBlackHub Drilling28ISO Diameter584 / 650b / 27.5"Manufacturer Spec ERD (mm)559Rim Center Offset (mm)4Rim MaterialCarbonRim Width (Internal)30Tire TypeTubeless ReadyValvePrestaWeight497Wheel Size27.5"