TheSpecialized Road/MTB Rib Cage II is stiff, lightweight and it will keep your bottle secure. This cage is perfect for both road bikes and mountain bikes and as it has such a low bottle position, it greatly improves aerodynamics. The tuned compression design will secure your bottle in place throughout rough terrain, but it still maintains an easy in/out system. This bottle cage has been constructed from a reinforced composite material for high strength and druability at an exceptionally low weight.The cage has a minimalist, sleek design with razor-sharp graphics and it's available in a variety of colours to suit every bike. Specialized Road/MTB Rib Cage II Features Super-low bottle position improves aerodynamics Tuned compression design allows for secure bottle retention, with easy in/out accessibility Reinforced composite material improves durability without adding weight Minimalist, sleek design with razor-sharp graphics " More info