XLAB's Gorilla Carbon Cage is one of the most popular rear bottle cages on the market! It boasts an amazing 7-pound grip force to keep bottles in place on bumpy roads and it's been specifically tweaked to work perfectly with saddle-mounted cage carriers. The Gorilla has over two times the gripping force of conventional carbon cages thanks to its 6 carbon gripping fingers, its top and bottom retention tabs and thicker carbon construction. And, it's still easy to slide your bottle out and grab a drink even when you're pushing it to the limit.