KOM Tough rims are extruded from top-tier AL 6069 alloy to provide utmost durability at a reasonable weight Dual support beams provide increased strength and stiffness for the world�s most aggressive riders Integration of the all-new Solid Strip on TCS 2.0 rims delivers the easiest to mount and most reliable tubeless system WTB has ever made A recessed channel along the center of TCS 2.0 rims allows installation of the all-new Solid Strip, which prevents tubeless tape from sagging at the spoke holes and results in a smooth, consistent interface between the tire and rim The TCS 2.0 bead hook shape has been updated to implement a more natural junction between the rim and an inflated TCS tire improving retention and performance 40 and 45mm models feature the new Dropdown center channel for easier tire removal and changing 29in WTB KOM Tough 622 35 39 Dbl DISC Black 32 PV 615gUPC/EAN/GTIN: 714401205703