Wolf Tooth derailleur screw 25 mm B-screw
When using a 42z pinion with a Shimano derailleur, it is necessary to install this screw in the derailleur.
This longer B-bolt is not needed with GoatLink. When using larger cogs, GoatLink is recommended for your Shimano derailleur as it will improve long-term shifting and drivetrain life. Make sure you have a compatible derailleur as detailed on the GoatLink product page.
Material: stainless steel
Weight: 2.5 g
Groupset | Other |
product ID | 165926 |

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