Surly Track Cog 1/8'' X 19t Silver MFPN=DROPOUT-142 bib strap with perforations for

bib strap with perforations for increased breathability

model Trail Boss TCS Tough Fast Rolling SG1 IP+ E50 size 29" width 2

Carbon crankset with 3-bolt aluminum X-SYNC 2 chainring for Eagle Drivetrain Ecosystem compatibility

Rings 32 Defined Color Gray Spindle Interface Type SRAM DUB Chainring BCD Direct Mount SRAM Color Lunar Chainline/Hub Compatibility 135/142 MTB Hubs Drivetrain Speeds 12 Number of Chainrings Chain Retaining Single Crank Intended Use Mountain Pedal Spindle 9/16" BB Included No Crank Length (mm) 165

Compatible with most 1/8" single speed chains

Surly Track Cog 1/8'' X 19t Silver MFPN=DROPOUT-142 bib strap with perforations forSurly 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 Tooth Count 19 Size 1 8''