wolf-tooth-wolfcage-combo-pack-includes-49t-cog-18t-cog-sgs-adaptor-cage-for-xt8000-purple
wolf-tooth-wolfcage-combo-pack-includes-49t-cog-18t-cog-sgs-adaptor-cage-for-xt8000-purple, The GC 49 cassette extender cog allow you to modify your 11 speed Shimano 11-42T cassette to create an ultra-wide range 11T-49T cassette. Includes 18T cassette cog for optimal gearing in the smaller cogs as well as WolfCage adaptor and derailleur pulley. GC49 features 7 shift gates for faster shifting.Compatible with Shimano 11-40 and 11-42 11-speed cassettesShimano rear derailleurs require the use of the WolfCage with a GC49