SRAM X5 8 / 9 Speed Rear Derailleur - SilverSRAM X5 8 9 Speed Rear Derailleur Silver The SRAM X5 Rear Derailleur is a 8 9 speed mech which uses a 1: 1 cable pull ratio and is compatible with all SRAM 8 9 speed MTB shifters. The SRAM X5 Rear Mech Derailleur brings you the trustworthy SRAM quality in a super light design that works wonders for your 9 8 speed shifting requirements. Fits 9 8 speed shifting requirements Lightweight Material: Alloy B Knuckle, alloy Links, high Strength grilon