This Flex-On Aluminum Inclined Stirrups Ultra Grip is the original model of the Flex-on range. It provides improved technical performance through its ergonomics and shock absorption system. Aluminum Flex-on uses the same technical characteristics as the Green Composite with a sober and elegant design. The Aluminum stirrup is composed of a forged and hot-forged part which will give the stirrup more solidity and better mechanical resistance. The aluminum stirrup receives a surface treatment by hard anodic oxidation which will improve its resistance to friction and its longevity.