The Crankbrothers Front 9mm Standard Endcap Iodine allows for easy conversion of your Crankbrothers wheels to fit different frame spacings. Weighing just 28 grams per pair, these endcaps are both lightweight and durable, ensuring optimal performance. They are specifically designed for Iodine, Opium, and Sage front wheels, providing a simple solution to enhance your bike's versatility.