Enhance your bikes performance with the Bike Yoke Shifty Series, a premium line of high-quality derailleur pulleys designed for serious mountain bikers and cycling enthusiasts. Crafted from durable, lightweight aluminum and equipped with sealed (2RS) stainless steel bearings, these pulley wheels deliver smooth, free rotationeven in the muddiest conditionsensuring optimal shifting performance and reliability on rugged trails. Compatible with popular SRAM 1×11 and 1×12 rear derailleursincluding NX1, GX1, X1, X01, and XX1these pulleys are engineered to upgrade your drivetrain with precision components and advanced technology. Available in striking colors like Gold, Red, and Black, the Bike Yoke Shifty pulleys combine style and functionality for aggressive cycling styles and demanding rides. Whether youre replacing worn-out parts or enhancing your bikes shifting efficiency, these pulley wheels are the innovative choice for reliable, high-performance cycling. Note: 3rd-party online sales (eBay, Amazon, etc.) are strictly prohibited by the manufacturer to ensure product authenticity and quality.