The Topeak Shuttle Bottle Cage features a unique mounting design that allows you to install the bolts first, then mount the bottle cage in position.Topeak Shuttle Bottle Cage SpecificationsEngineering grade polymer constructionFits standard water bottlesWeight: 53gSize: 14.6 x 8.1 x 7.8 cm / 5.7” x 3.2” x 3.1” More info