The SRAM RED 10-Speed Rear Derailleur Aero Glide is crafted to offer the high performance you expect from SRAM. Featuring WiFLi technology, this rear derailleur extends its cage and adjusts its geometry to fit an 11-32 cassette. This setup provides a broader gear range than a typical triple chainring system, while also reducing weight by over 250 grams. SRAM has focused on the details, incorporating a hollow titanium anchor bolt and refining the tooth geometry of the jockey wheel. These enhancements ensure that the chain moves through the SRAM RED 10-Speed Rear Derailleur Aero Glide more smoothly and quietly than before. Key Features: WiFLi technology for extended cage and varied geometry Compatible with 11-32 cassette Over 250 grams lighter than standard triple chainring systems Hollow titanium anchor bolt for reduced weight Refined tooth geometry for smoother chain movement