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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

REVIEW SNAPSHOT®

by PowerReviews
Surly Single Speed Cog
 
4.6

(based on 19 reviews)

Ratings Distribution

  • 5 Stars

     

    (14)

  • 4 Stars

     

    (4)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

100%

of respondents would recommend this to a friend.

Pros

  • Durable (10)
  • Easy to install (8)
  • Attractive (6)

Cons

    Best Uses

    • Mountain biking (8)
      • Reviewer Profile:
      • Avid cyclist (8)
      • Was this a gift?:
      • No (10)

    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

     

    great until it...

    great until it ruined my rear hub I am assuming shouldn't have a problem with a steel free hub body but nowhere in the instructions did it say not to use this product with a...Read complete review

    great until it ruined my rear hub I am assuming shouldn't have a problem with a steel free hub body but nowhere in the instructions did it say not to use this product with a alu free hub body

    Reviewed by 19 customers

    Sort by

    Displaying reviews 1-10

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    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
             
            5.0

            Exactly what you need

            By Kman

            from Bozeman, Montana

            About Me Avid Cyclist

            Verified Reviewer

            Pros

            • Attractive Design
            • Durable
            • Easy To Install
            • Simple

            Cons

              Best Uses

              • Downhill
              • Mountain Biking

              Comments about Surly Single Speed Cog:

              Extremely easy and well built cog. Pair it with some spacers and it cannot be beat for an easy single speed conversion.

              • Was this a gift?:
              • No
               
              4.0

              thick

              By Mr Rob

              from murphy NC

              About Me Casual/ Recreational

              Verified Buyer

              Pros

              • Durable
              • Easy To Install

              Cons

                Best Uses

                • Mountain Biking

                Comments about Surly Single Speed Cog:

                it is offset on one side like the others have said so it is thicker than normal where the freewheel goes through. I had to cut .082 off my outside spacer for it to fit but buying a spacer kit would probably work also but im a machinist so it was no trouble. It seems to be very strong and has a very positive engagment with the chain. its a cog theres not much else to say about it

                • Was this a gift?:
                • No
                 
                5.0

                Gets the job done / Looks great

                By MTB Rob

                from Redding Ca

                About Me Avid Cyclist

                Verified Buyer

                Pros

                • Attractive Design
                • Durable
                • Easy To Install
                • Lightweight

                Cons

                • NONE

                Best Uses

                • Mountain Biking

                Comments about Surly Single Speed Cog:

                I own both the 18 and 19 tooth cog and run them on my Civilian Luditte. Availability of a 19 tooth / odd size cog is a plus.

                • Was this a gift?:
                • No
                 
                5.0

                BOMB PROOF COG

                By T-Ride

                from Michigan

                About Me Avid Cyclist

                Verified Buyer

                Pros

                • Attractive Design
                • Durable
                • Easy To Install

                Cons

                • NONE

                Best Uses

                • Mountain Biking

                Comments about Surly Single Speed Cog:

                The Surly cog is the only way to go in my book. Cheaper than a lot of other cogs, a heck of a lot stronger than aluminum cogs (I've sheared teeth off of two seperate aluminum cogs, will never go that route again) Nothing better than an all steel drivetrain for SS use. You can't go wrong with this setup.

                • Was this a gift?:
                • No
                 
                5.0

                Bomber!

                By JK

                from Flagstaff, AZ.

                About Me Avid Cyclist

                Verified Buyer

                Pros

                • Durable
                • Easy To Install

                Cons

                  Best Uses

                  • Mountain Biking

                  Comments about Surly Single Speed Cog:

                  I bought this 21t to switch-out a 20t I've been riding (hard)for the last 3-years. Looking at the old cog next to the new cog -- there was absolutely no wear on the old cog. I do not beleive you can wear these things out!!

                  • Was this a gift?:
                  • No

                  Displaying reviews 1-10

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                  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.