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Wolf Tooth Components 25mm B-Screw
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
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