It`s a great way to carry up to 25 Lbs. of stuff you need with your bike whether going on a long tour or just commuting to work. Especially designed to match Ray-1 and Ray-1X produced since 2000. Made from sturdy but lightweight 6061 alloy with black hard anodized finish it comes with all the hardware needed to be installed in minutes. It`s also compatible with most mid-size panniers.