SRAM X9/X7 2010+ Pulley Kit Replacement Pulleys Much like all the moving parts on your bike, the pulleys on your rear derailleur will begin to wear out. Luckily they can easily be replaced with new pulleys. The SRAM X9/X7 2010+ Pulley Kit comes with two pulleys for your SRAM X9 or X7 rear derailleur. It is designed for 2010 and newer 9 or 10-speed rear derailleurs. Features Includes upper and lower pulley wheels Works with 2010 and newer SRAM X7 & X9, 9 or 10 speed rear derailleurs | Sram | X9/x7 2010+ Pulley Kit 10-'11 X9 & X7