Whether we're just sending it around Park City or we're racing, we feel confident on the Reserve 30 HD Alloy 27. 5in i9 1/1 Super Boost Wheelset. These wheels are seriously strong, stylish and incorporate some of the best technology the industry has to offer. This wheelset starts out with a 6069 aluminum alloy rim with external nipple reinforcement, J Bend spokes, and an asymmetrical design for stiffer, stronger wheels. Next, Industry Nine's 1/1 Super Boost hubs up the stiffness and strength even more and take the value-to-price ratio of this aluminum wheel sky-high. Each Reserve wheel is fitted with their patented Fillmore valve, which has a high-flow design and makes tubeless setup a breeze.