FE-SSK (Single
Speed Kit)
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, and lockring
Cog Options: 12t and 13t cogs (3mm thick, only for single speed chain)
14t and 16t cogs (2.3mm thick, within 7 speed chain)
16t and 18t cogs (2.3mm thick, within 7 speed chain)
Colors: Black, Green, Orange, Red, and Pink with polished cogs and a lockring
Surface finish: polished and anodized