KustomCaps headset caps are designed to fit 1 1/8" headsets and measure 1 1/4" (32mm) in diameter. This is the most common size on modern bicycles. Our traditional domed caps weigh 9 grams and flat caps weigh 5 grams. They are both made of 6061 aluminum. Our headset bolts are made of 7075 aluminum are M6 x 30mm in size and weigh 3 grams. Please check our color chart for the most accurate anodized color representation.
Any questions about other sizes? Hit us up here for more info.