STI Out & Back XT Tire (26x11-12) The STI Out & Back features a center "V" tread pattern to deliver comfort and control on hardpack. At the same time, its deep, dimpled lugs dig aggressively and cleanout well to keep you moving through deep and sticky mud. Wraparound shoulder lugs provide side bite. The result is a tire that lives up to its name. If you're going way out and want to get back, get outfitted with the STI Out & Back.