MDC Sport Classic Stirrups MDC Intelligent Stirrups are a revolutionary breakthrough in design, comfort, safety, and improved riding efficiency. Improves leg, calf, and foot positions. Relieves pressure in ankles, knees and hips because these stirrups come to you instead of you trying to find them. The Sport Classic Stirrups feature solid sides offering a more traditional look. SuperSport Stirrups offer the look and strength of stainless steel, blended with the lightness of polished aluminum. Combination of these metals maintains a traditional look for the show ring and unsurpassed strength. Customize your stirrup setting with the patented adjustable top which can be preset to any of the three stirrup positions: Traditional, 45, or 90.