BikeHard Full Carbon 1 1/8" Top CapThe BikeHard Top Cap is completely constructed from hi modulus carbon fiber. At less than 6 grams, it weighs in at almost half what an alloy top cap weighs, and does the same job of compression that a metal top cap does. Moreover, its bolt recesses into the cap to provide a flush clean look. Simply put, this little upgrade will decrease weight and increase the style for any bicycle.850228007974