Vittoria Saguaro Tire - 29 x 2.25 Tubeless Folding BlackVittoria Saguaro Tire 29 x 2. 25 Tubeless Folding Black. The Saguaro is the classic workhorse of the Vittoria MTB line. With its proven tread design stellar durability and low rolling resistance the Saguaro is your trusted companion for epic long haul adventures. By bridging the center ridge the tread remains supported through its useful wear life. The square mid knobs also feature a bridge for longevity and support. This equates to a rock solid