The ARC Offset rims utilize an asymmetrical design to optimize spoke tension balance, wheel durability and wheel stiffness. New 6069 Alloy provides a superior strength to weight ratio, significantly improving toughness.Offset nipple bed for improved spoke tension balance and wheel strength/stiffness Tubeless ready, strong tire retention bead Item Specifications ColorBlack Hub Drilling32 ValvePresta ISO Diameter 584 / 650b / 27.5" Wheel Size27.5 Tire TypeTubeless Ready Brake TrackNone Rim MaterialAlloy Rim Width (Internal)35 RaceFace ARC Offset Rim Rims UPC: 821973335872