Every mountain biker would love to have a wheelset for every type of weather and terrain. Unless you have a money tree in your backyard, however, it just isn't going to happen. That's the beauty of the all-mountain tire. The Vittoria Goma TNT 27. 5 Tire is designed to tackle every type of terrain in wet, dry, muddy, or sandy conditions. And, while it may not be the absolute best tire for each and every possible condition, it's nice to know that your bike is set up to handle any type of trail you may encounter along the ride. The Goma's tread pulls out all the stops for an all-mountain tire. A super sticky compound is formed into large, aggressive knobs that are siped and stepped for excellent mud-shedding and true high-speed tracking over both mild and highly technical terrain. Cornering is superb and progressive. Rolling resistance is low. Braking is right now. And, while Vittoria does offer a non-tubeless version of the Goma 27. 5, this TNT version still manages a relatively low weight to go with its additional durability, coming in at very decent 800 grams for the 2. 25" version.