Wolf Tooth Components 42T GC Cog - Shimano

Item: 50-3898
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If you're converting over to a 1x drivetrain, or just need a bigger bail out gear for some super hilly trails, then you need the Wolf Tooth Components 42T add-on cog. This huge cog will give you an extra wide range that can enable you to get up and over pretty much anything in your path. To install, simple remove your cassette from the wheel, remove either the 15T or 17T cog, install the GC 42, then the rest of the cogs in the correct order. It's super easy, and lets you modify your existing cassette for a wider range. After installation, you may need to replace the B-limit screw on your Shimano derailleur with the Wolf Tooth B-Screw (50-3897) for proper performance.

The Wolf Tooth GC cogs are only compatible with Shimano XT and XTR 10-speed cassettes

  • Add-on cog for Shimano XT or XTR 10-speed cassettes
  • Replaces either the 15T or 17T cog
  • Improves the gearing range for 1x and 2x drivetrains
  • Compatible with medium and long cage derailleurs for 1x drivetrains
  • Compatible with long cage derailleurs only for 2x drivetrains
  • Made in the USA
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