Wolf Tooth 25mm B-screw
When using the GC 42 or GC 40 with a Shimano rear derailleur, a longer B-screw may be needed. This is a high quality, 18-8 stainless steel M4 x 25 mm screw.
BEST USES: Mountain Biking, Upgrade
PROS: Saves A Trip To Your Lbs, Easy To Install
BEST USES: Big Cog Conversion, Upgrade, Mountain Biking
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PROS: Great Components
Q & A
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