Vittoria Terreno XC-Race 29x2.1 MTB TyreMade for enhanced rolling Aggressive file tread, or super low profile knob design? The Terreno bridges the gap between file treads, and traditional all conditions treads. The key to this is the unique angled fish scale design, that allows the center tread to roll extremely fast, yet offer traction when loaded in cornering and braking. Add the transitional height mid and side tread, and the Terreno Dry transitions as smoothly as it rolls. From gravel