Stirrups in the aluminum range are made of a special type of aluminum used in aeronautics. The flex-on stirrup offers sophisticated bending, which absorbs shock with a tread that has a grip or ultra-grip surface for better adhesion, optimal stability, and a perfect connection with the horse. The stirrup frame with its offset, skewed slot for the stirrup leather is ultra lightweight. The flex-on aluminum stirrup is fully machined from a solid block.