Topeak Cage Mount QR An innovative low profile quick release system that fits between the bottle cages and bike frame that allows each cage to be removed without the need to unscrew the bolts. This lets extra small bike frames to be carried by a rear mounted car racks (by allowing more room between the frame tubes when cages are removed) and prevents cage damage by rear type bike carriers. The perfect solution for preventing damaged bottle cages for all bike frame sizes. QR CageMount Features: Mount: Water Bottle Boss Mount One Touch Button Removes Cage Quickly Ideal For Use With Car Carriers QR CageMount Specifications: Material: Engineering Grade Plastic Weight: 32.6g / 1.15oz Size: 10.9 x 4.4 x 9.5 cm / 4.3” x 1.7” x 3.7” Buy Topeak Water Bottle Cages from Chain Reaction Cycles, the World’s Largest Online Bike Store.