SRAM MRX 5 Speed Twist Shifter (Rear) 2:1 Shimano Compatible The MRX CLASSIC ergonomic shifter is the original unchanged Grip Shift shifter that has sold in the millions across the globe&44; because of its entry level price & compatibiliy with DIRT & Shimano* derailleur systems Ergonomic hex-profile shifter cover with soft density grip Sram composite construction 5 speed DI.R.T. & Shimano* compatible