WTB Nine Line 29er TCS Light Mountain Tire. If you're serious about blazing fast speed on your 29er then the WTB Nine Line 29er TCS Light mountain tire will deliver the goods. Its pared down, consistent micro blocks are fast rolling and deliver remarkable lateral traction. A rounded profile and ample dosing of working edges provide predictability that makes for an easy transition from the short track to the single track. It's tubeless compatible and features WTB's exemplary, super supple lightweight casing for the ultimate in handling and performance.