Vittoria Goma AM Folding Tire - TNT From enduro podiums to technical trail riding, the Goma is your choice for long-lasting, dependable performance. Starting with the large surface area knob profile, the Goma offers unmatched durability in hardpack and rock conditions. Each knob is then equipped with directional siping that flexes under load, providing traction in cornering as well as braking. The most fun XC tire or the fastest rolling trail tire? The Goma blends the best of both worlds. Why choose when you can have it all?