The Sram X.9 Twister shifters feature a less aggressive grip than X.0 with the same performance and qualities. Superior 1:1 Actuation Ratio™ and SRS Technology. The lightest shifter available in its class. Designed with multiple shift capability and Integrated Quick View Gear Indication. 9 speed compatible with Sram 1:1® rear derailleurs Sram or Shimano® front derailleurs. Lightweight Grilon® body and Amy® Grip for smaller Hands. 195 grams / pair.