"The Royal Rider Evo-Action Stirrups include a spring and coil system at the stirrup leather placement that is designed to adjust to the weight of the rider. The shock and tension of impact are absorbed and smoothly distributed through the body of the stirrup, through the natural flexibility and strength of the stirrup’s techno-polymer components. These durable, lightweight stirrups are made to ensure maximum shock absorption, providing cushioning relief from stress of impact and jostling movements upon the your joints."
I only tried these for a few rides, and they still look brand new. Great for bad knees. I really liked them but my ankle prefers the stirrups that drops to a 70% angle.
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