SRAM X1 TYPE-2.1 11 Speed Medium Cage Rear Derailleur

• Newer Design Type 2.1
• Large upper pulley offset automatically adjusts chain gap
• X-HORIZON design reduces shift force, ghost shifting and chain slap
• Alternating Wide-tooth-narrow-tooth pulley wheel maximizes chain control by fitting inner and outer chain links perfectly
• 12-tooth X-SYNC pulley wheels
• Aluminum Cage
• Sealed cartridge bearings
• Colors: Black
• Must be used with SRAM 1x11 shifter, chain and cassette for performace
• Published Weight: 256g
• Largest Cog Capability: 42t
• Chain Wrap: 32

The X1 group has all the important features of the high-priced spread with a modest increase in weight.