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The FireEye SSK (Single Speed Kit) converts a standard 8/9-speed shimano-splined cassette hub to a single speed hub in a snap. The SSK comes with two (12/13T, 14/16T, or 16/18T) cogs, 3 different sized alloy spacers to provide proper chainline alignment, and a lock ring to keep everything locked down tight. You'll be pleasantly surprised how easy and enjoyable a single speed can be.

Kit Includes:

  • 3 different sized threaded spacers
  • 2 cogs
  • Lockring

Cog Options (for single speed chains only):

  • 12t and 13t cogs
  • 14t and 16t cogs
  • 16t and 18t cogs