STAN'S, the pioneer of the tubeless ready system, is an American wheel manufacturer that is a purveyor of the world's top racers. The rim, which has a lightweight and wide design, boasts high strength while being lightweight by lowering the sides. The aluminum rim "MK4" has been updated from the philosophy that "a truly innovative product is to always exceed the limits of ideas and inspiration." At the same time, it became asymmetrical offset design, making it possible to assemble a highly stable wheel with optimized spoke tension. In addition, the eco-friendly, natural tire sealant will not freeze in cold conditions like -20°F (-28°C) and quickly punctures up to 1/4 inch (6.5mm). Seal Combined with the DART TOOL for bigger punctures, it's fast, easy and revolutionary. With constant evolution, STAN'S sealant continues to earn the No. 1 rating in the bicycle tire sealant market, as it lives up to its name, “The First Name in Tubeless”.