Alpinestars Rk-7 Plasma Knee Braces The Rk-7 Plasma Knee Brace combines a slim, ergonomic design with cutting-edge technology to provide exceptional knee support during dynamic off-road activities. Engineered for both high performance and comfort, it integrates a lightweight yet protective structure that features a free-floating Nucleon Plasma knee protector within an asymmetric, fiber-reinforced frame for enhanced rigidity and durability. Its breathable construction ensures comfort, making it an ideal choice for athletes seeking superior knee support without compromising on mobility or protection. Sizing: The RK-series size chart that Alpinestars provides suggests sizes that are too small Riders suggest purchasing the same size RK knee brace as you wear in other knee braces Pat from the video has a 4.16 measured knee width and requires a size LG knee brace Features: Rk-7 features a more streamlined design than the Rk-1, especially at the sides Less material on the inner calf and thigh Better bike feel / lets you grip the bike with your leg more Dual hinge pivoting system with off-set design gives a more natural knee bend Numbered for proper fitment Adjustable stopper plates to customize the fit / preferred locations 0-30 degrees by 5 increments Ultra lightweight and adaptive Replaceable polyurethane and Nucleon Plasma triple segmented knee cups Self-centering knee cup Slim design four-point hinge system Stainless steel bushings CE level 1 certified Sold as a pair