Wolf Tooth Components GC49 (Silver) (49T & 18T Cogs) (For SRAM NX Cassettes)

The GC 49 cassette extender cog allow you to modify your 11 speed SRAM NX or Sunrace 11-42T cassette f to create an ultra-wide range 11T-49T cassette.  To achieve the optimal shifting, the GCs are optimized for SRAM/Sunrace cassettes. Includes 18T cassette cog for optimal gearing in the smaller cogs. GC49 features 7 shift gates for faster shifting.