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: Color, Black, Hub Drilling, 32, Brake Track, None, Rim Width (Internal), 30 mm, ISO Diameter, 622 / road / 29", Rim Material, Alloy, Rim Center Offset (mm), 4.25 mm, Tire Type, Tubeless Ready, Wheel Size, 29", Valve, Presta,.