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Surly Single Speed Cog

Item #: CS409C06
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USD$30.00
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Surly's BMX / Singlespeed cogs fit the (common) splines of Shimano/SRAM and Shimano-compatible freehub bodies - thats virtually every MTB hub on the market today. Built of practically indestructible hardened chromoly steel, these cogs are ready to lick up what you dish out. Larger sizes include drillings to save weight.

  • Incredibly durable SCM-415 hardened chromoly steel
  • Designed for use with 3/32" (i.e., 8/9/10 speed) chains
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REVIEW SNAPSHOT®

by PowerReviews
Surly Single Speed Cog
 
4.4

(based on 24 reviews)

Ratings Distribution

  • 5 Stars

     

    (17)

  • 4 Stars

     

    (4)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (2)

90%

of respondents would recommend this to a friend.

Pros

  • Durable (14)
  • Easy to install (8)
  • Attractive (6)
  • Easy to use (5)
  • Lightweight (3)

Cons

    Best Uses

    • Mountain biking (8)
    • Mountain bikes (5)
      • Reviewer Profile:
      • Avid cyclist (11)
      • Was this a gift?:
      • No (15)

    Most Liked Positive Review

     

    Solid Unit

    Intelligent design which includes being able to better align the cog with the chain line depending upon which side you have facing outward. Longer teeth help to minimize the incidence of slippage and maximize...Read complete review

    Intelligent design which includes being able to better align the cog with the chain line depending upon which side you have facing outward. Longer teeth help to minimize the incidence of slippage and maximize chain wrap. Larger sizes have been drilled (see picture) to reduce weight penalty. Mating surface of cog to free hub has a wider contact patch thus reducing the potential of shearing and damaging your free hub.

    VS

    Most Liked Negative Review

     

    lots of chain slip

    I bought this to get a faster ratio than my previous setup, but I ended up with a lot of chain skipping when accelerating to climbing hills. I tried two other chains (both...Read complete review

    I bought this to get a faster ratio than my previous setup, but I ended up with a lot of chain skipping when accelerating to climbing hills. I tried two other chains (both brand new), and tried a new tensioner. No change. The chain rollers like to ride up over the teeth on the sprocket, even with 180 degrees of chain wrap on the sprocket.

    Switching to an Endless rear sprocket solved the chain skip problem completely. Same chain, same tension, same amount of chain wrap, just no more skipping. I'm done with Surly sprockets.

    Reviewed by 24 customers

    Sort by

    Displaying reviews 1-10

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    5.0

    great product

    By pico

    from Ecuador

    About Me Competitive Cyclist

    Verified Buyer

    Pros

    • Durable

    Cons

    • Bulky

    Best Uses

    • Mountain Bikes

    Comments about Surly Single Speed Cog:

    great single speed cog. the 22t gives a great climbing gear combined with a 33t chainring.

    people can say it's heavy, but 20g really doesn't make a big difference...

    • Was this a gift?:
    • No
     
    5.0

    Good strong cog

    By Cheech

    from Grand forks

    About Me Avid Cyclist

    Verified Buyer

    Pros

    • Durable
    • Easy to Use

    Cons

      Best Uses

      • Commuting
      • Mountain Bikes

      Comments about Surly Single Speed Cog:

      Good strong cog, has the added benefit of being offset. Which makes it easy to line up your chain line.

      • Was this a gift?:
      • No
       
      5.0

      Gears are for...

      By Danc

      from Oklahoma

      About Me Competitive Cyclist

      Verified Reviewer

      Pros

      • Durable
      • Easy to Use
      • Lightweight

      Cons

        Best Uses

        • Cyclocross
        • Mountain Bikes
        • Road Bikes

        Comments about Surly Single Speed Cog:

        I use this on my single speed cross bike. I have 19, 20, and 22, for different race conditions. Wider contact with the free hub for better stability. works well with Surly single speed conversion kit.

        • Was this a gift?:
        • No
         
        3.0

        Works fine, cheaper options out there.

        By Elsanto

        from Plainfield Nj

        About Me Avid Cyclist

        Verified Reviewer

        Pros

        • Durable
        • Easy to Use

        Cons

          Best Uses

          • Mountain Bikes

          Comments about Surly Single Speed Cog:

          I was using this on my SS 29er but wanted to try some different gearings out. I bought a cheap multi-cog kit from here for the same price as this one cog. my legs can't tell the difference between the cheap ones and this one.

          • Was this a gift?:
          • No
           
          1.0

          lots of chain slip

          By Delaminator

          from Duthie Hill, Washington

          About Me Avid Cyclist

          Verified Buyer

          Pros

            Cons

            • Poor Quality

            Best Uses

              Comments about Surly Single Speed Cog:

              I bought this to get a faster ratio than my previous setup, but I ended up with a lot of chain skipping when accelerating to climbing hills. I tried two other chains (both brand new), and tried a new tensioner. No change. The chain rollers like to ride up over the teeth on the sprocket, even with 180 degrees of chain wrap on the sprocket.

              Switching to an Endless rear sprocket solved the chain skip problem completely. Same chain, same tension, same amount of chain wrap, just no more skipping. I'm done with Surly sprockets.

              • Was this a gift?:
              • No
               
              5.0

              Good quality, good price

              By TXMTB

              from Dallas Texas

              About Me Avid Cyclist

              Verified Buyer

              Pros

              • Durable
              • Easy to Use
              • High quality

              Cons

                Best Uses

                • Mountain Bikes

                Comments about Surly Single Speed Cog:

                The Surly cog is a great buy, it has a nice wide body that won't tear up your freehub and it fits well.

                This does not come with a Singlespeed conversion kit, it is just the cog. If you are just converting be sure that you grab another pack that includes the full conversion kit with spacers and lock ring.

                • Was this a gift?:
                • No
                 
                4.0

                Thick and Cheap

                By jamez667

                from Vancouver, BC

                About Me Casual/ Recreational

                Verified Buyer

                Pros

                • Durable
                • Easy to Use

                Cons

                • Not 18
                • Not One Eigth Inch

                Best Uses

                • Commuting

                Comments about Surly Single Speed Cog:

                Only downside is that i couldn't find it in 1/8" other than that its perfect.

                • Was this a gift?:
                • No
                 
                5.0

                Sturdy and good looking.

                By PhxMtber

                from Phoenix, AZ

                About Me Avid Cyclist

                Verified Reviewer

                Pros

                • Attractive Design
                • Durable
                • Easy To Install

                Cons

                  Best Uses

                  • BMX
                  • Mountain Biking

                  Comments about Surly Single Speed Cog:

                  I put this on my SS MTB to make the gearing easier. So far I'm very please. No damage to any other parts, and the price was right.

                  • Was this a gift?:
                  • No
                   
                  5.0

                  Great part from a great company!

                  By Fishy

                  from Mn

                  About Me Avid Cyclist

                  Verified Buyer

                  Pros

                  • Attractive Design
                  • Durable
                  • Easy To Install
                  • Excellent Quality

                  Cons

                    Best Uses

                    • Mountain Biking
                    • Upgrade

                    Comments about Surly Single Speed Cog:

                    Bike I built came with a cheesy stamped cog and also wanted a little more gear. So went with this stout surly cog in a 21t to fit my needs. Excellent fit, not many miles on it yet but based on other reviews and surlys rep. Im sure it will hold up great!

                    • Was this a gift?:
                    • No
                     
                    5.0

                    One gear is all you need-- this gear

                    By Warren

                    from Shreveport, LA

                    About Me Avid Cyclist

                    Verified Reviewer

                    Pros

                    • Attractive Design
                    • Durable
                    • Easy To Install
                    • Lightweight

                    Cons

                      Best Uses

                      • Mountain Biking

                      Comments about Surly Single Speed Cog:

                      Surley cogs are awesome. I got a 22 which I found out was too low when attackin uphill -- so I went to a 20 -- no more lost momentum. This is a great quality, solid cog with a wide base and compatiple with a broad range of hubs.

                      • Was this a gift?:
                      • No

                      Displaying reviews 1-10

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                      Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

                      Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.