Great technology can change the way you ride, and with the Avid HS1 Heat Shedding Rotor you'll be riding longer than ever. With a new cross-drilled design, the HS1 holds true to its name by efficiently shedding heat. It allows you to tackle the technical by riding the brakes to your heart's content without fear of overheating. More control, less weight, and minimal wear -- that's our kind of rotor. The Avid HS1 Heat Shedding Rotor is the next step in disc brake technology. The one-piece stainless steel design utilizes cross-drilled technology (think Merckx-era drillium) for significant weight savings without compromising durability. The new design promotes heat regulation, and weighs around ten grams less than previous models. The cross-drilling also sheds water quickly, resulting in increased stopping power in wet weather. The Avid HS1 Heat Shedding Rotor is available in 160mm, 180mm and 200mm size. It uses the IS 6-bolt mounting pattern.