WTB's proprietary 4D spoke drilling prevents binding and lateral loading of the spokes, while the spoke bed itself has been updated to provide a more compatible interface between the spoke and rim. Integration of the all-new Solid Strip the TCS 2.0 rims delivers an easy to mount and reliable tubeless system.TCS2.0 rims require the application of TCS tape on top of the Solid-Strip. TCS 2.0 creates a more robust, easily installed and dependable tubeless system. 4D angled spoke drilling eliminates binding and lateral loading, and disperses tension more evenly over a greater area. Item Specifications: Brake Compatibility, Disc Only, Rim Width (Internal), 25, Brake Track, None, Manufacturer Spec ERD (mm), 606, Material, Alloy, Valve, Presta, Color, Black, Weight, 450, Wheel Size, 29", Defined.