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Single Cog - Steel

5 out of 5 stars
1 Review
$21.70 - $35.00
Up to 38% off

Style & Size:


Why We Like The Surly Single Cog

Sometimes you need a smaller cog, and sometimes you need a bigger one; luckily, the Surly Single Cog caters to your fancy. The machined SCM415 Cro-Moly steel cog features a tall tooth profile to prevent chain skip and works with six-to-nine-speed 3/32in chains. Available in every increment from 13-22T for perfect gearing, the cog is stackable and derailleur compatible for multi-speed drivetrains. The CroMoly steel is heat-treated for ultimate strength properties and chrome-plated for surface hardening and improved chain lubricity.


  • Extend your drivetrain from 13-22T for perfect gearing
  • Stackable and derailleur compatible for a multi-speed drivetrain
  • Heat-treated for ultimate strength
  • Chrome-plated for surface hardening and improved chain lubricity
  • Item #SRY0001
SCM415 CroMoly steel
13t, 14t, 15t, 16t, 17t, 18t, 19t, 20t, 21t, 22t
Claimed Weight
[18t] 2.4oz (68g)
Manufacturer Warranty
limited 1 year

Overall Rating

5 based on 1 ratings

Review Summary

1 Stars - 0 reviews
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5 Stars - 1 reviews

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5 out of 5 stars

October 29, 2021

It works

I've put it through the wringer
5' 8"

I?ve been running the 22T cog for a little over 1K miles now on my single speed. It?s not showing much wear at all. While it could be lighter I?m sure that would compromise its longevity to some degree. It has a nice wide platform so it doesn?t eat into your cassette which is nice. It?s just as good as my light weight Endless cogs I run also, with the one caveat that it?s a little heavier. I?m no weight weenie though I care about durability.

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