Wolf Tooth Components 25mm B-Screw

Item: 50-3897
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When using the Wolf Tooth GC 42 (50-3898) or GC 40 (50-3899) replacement cogs with a Shimano rear derailleur, a longer B-screw will be needed for proper adjustment. High quality 18-8 stainless steel screw is compatible with most Shimano mountain bike derailleurs.
  • Replaces stock B-limit screw on Shimano MTB derailleurs
  • Use if you are using Wolf Tooth GC 42 or GC 40 large cogs
  • High quality stainless steel
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