Semi angular box-section double wall T-10 heat treated alloy . High strength for DH and Dirt Jump. Double stainless steel spoke eyelets. Double Joint System: double-secure pinned and sleeved non-welded joint . Drilled for Schrader valves. Not tubeless compatible. As the braking surface is not CNC finished, there is a bedding in periodItem Specifications: Internal/External, 30mm, Number of Holes, 48, Type, Non-Tubeless, Size, 26", Manufacturer Spec ERD (mm), 538mm, Color, Black, Model Name, SAS, Material, Aluminum, Brake Type, Disc/Rim, Wheel Depth, 22mm, Weight, 780g,.