Surly Track Cog 1/8'' X 15t Silver CheckoutSpec= X-FIRM (BLACK) 100mm-27 100mm - XC30 27.5 A1-A3/30 SILVER 27.5/29 A1 } FSA's core line of

} FSA's core line of headsets that have become an industry benchmark\nAll Orbit headsets feature forged and CNC machined 6061 T6 alloy cups

Includes steel rotor bolts

Color Black Defined Color Black Max Tooth (teeth) 44 Material Aluminum Chainring BCD 110 Mount Type Chainring

}Hayes Post Disc Brake Adaptor for Post Mount Frame +43mm typically for 203mm Rotor Diameter

Surly Track Cog 1/8'' X 15t Silver CheckoutSpec= X-FIRM (BLACK) 100mm-27 100mm - XC30 27.5 A1-A3/30 SILVER 27.5/29 A1 } FSA's core line ofSurly Track Cog 1 8'' X 15t Silver. Surly track cogs are threaded the same as a BMX freewheel (1. 375 x 24 tpi right hand threads). This means that they will fit on single speed rear hubs as well as BMX freewheel hubs but this application is not recommended. Track cogs are meant to work on track hubs only. 415 hardened chromoly steel 1. 375" x 24 tpi Photo for color and material reference only TECH SPECS Tooth Count 15