Product ID: 333222338203

Surly
Single Speed Cassette Cog

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$30.00
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Surly Single Speed Cassette Cog
all about the

Surly Single Speed Cassette Cog

Surly's cassette-type cogs are designed to fit on standard Shimano compatible freehub bodies. These cogs have a tall tooth profile that is essential for preventing chain skip from the extra torque a singlespeed drivetrain encounters. In addition to being a stellar SS cog, the cog base width (where it contacts the freehub body) is 4.35mm, so you can stack a few of them up and use a 9-speed shifter for a simplified multi-speed drivetrain. This width also prevents it from ruining the freehub body as a result of digging grooves into it like skinny stamped cogs have a tendency to do. Surly cogs are machined from SCM415 CroMoly steel, then heat-treated for toughness and chrome-plated for surface hardening and enhanced chain lubricity. These cogs will work with 6-9-speed 3/32" chains, although we recommend the inherently updated quality of an 8 or 9 speed chain. They are also available in every increment from 13-22t, so you can select that perfect gear.
questions about the

Surly Single Speed Cassette Cog

asked by: A Visitor
weight
answered by: canteau
The 16t Surly Single Speed Cog has an average weight of 62g
asked by: A Visitor
What tool do I need to install and do I need spacers/lockring for my Surly single spd hub?
answered by: mlewis
If your hub is a threaded hub, this cog will not work. This is designed to be used with Shimano type freehub bodies. Give us a call directly if you need more help!
asked by: A Visitor
Is the width of this cog compatible with a Nuvinci IGH? Do I need any spacers?
answered by: t.young
The cog width and spline are the same, so it should fit. I don't know why you'd need spacers as there's only one cog on that hub.
asked by: A Visitor
What is the diameter of the 17t cog?
answered by: mlewis
I measured a 17t cog at exactly 3" in diameter.
asked by: A Visitor
Will these cogs damage an aluminum freehub body?
answered by: mwirth
Should not be a problem for an aluminum freehub. Thanks!
asked by: A Visitor
Do you sell the lock nut to attach this to my hope pro hub?
answered by: s.myers
Any Shimano/SRAM compatible lockring should do (such as this one 333222374902). You'll also need a spacer kit (333222338205).
asked by: A Visitor
Will these cogs bolt to a disc brake mount?
answered by: jrichard
No, they will not.
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reviews of the

Surly Single Speed Cassette Cog

Just The Dirt
positive starpositive starpositive starpositive starpositive star
4.8 GEARS
15 reviews
LIKES
Simplicity (9)
High Quality (9)
Installation (7)
Value (6)
Wide Range (1)
DISLIKES
WORKS FOR
Mountain Biking (11)
Conversions (6)
Road (4)
member review badge
positive starpositive starpositive starpositive starpositive star
5
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
Very nice, very solid cog. Well made and has extra width at the base so it doesn't eat away at your freehub shell.

Yes, I would recomend this to a friend.

Likes: Simplicity, Installation, High Quality, Value

Works For: Mountain Biking, Road

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4
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
Thick, hardcore and strong. Nice quality.

Yes, I would recomend this to a friend.

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5
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
I'll echo what others have said. This is a good sturdy cog, but it does have spacing built in to one side, so if you want to flip it around you'll have to change your wheel spacers. (But then I'm not that cheap and would probably rather put in a new cog than flip it around--which I'm not sure would even work based on the Shimano cassette format.)

I'm running a 14 tooth on a fixed 29er built for road commuting. No complaints.

Summed up: Fixed. Simple. Solid.

Yes, I would recomend this to a friend.

Likes: Simplicity, Installation, Value, High Quality

Works For: Road

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4
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
Nice, simple, clean piece. Fits nicely on my Shimano (former 7 speed) cassette.
Not many do, but I wish I could get this rear cog in a color other than silver and with 12t.

Summed up: Basic item, works as expected.

Yes, I would recomend this to a friend.

Likes: Simplicity

Works For: Conversions, Mountain Biking

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4
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
This cog is heavy, but so is everything surly makes. Its great if you dont want to spend the money on a stainless cog. the only thing i dont like about it, is that you cant just flip it around when its worn without adjusting your chainline a little.

Yes, I would recomend this to a friend.

Likes: Wide Range

Works For: Mountain Biking

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5
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
Great cog and very solid part. Has nice big teeth so chain won't fall off. Used for a single speed conversion.

Yes, I would recomend this to a friend.

Likes: Simplicity, Installation

Works For: Mountain Biking, Conversions

member review badge
positive starpositive starpositive starpositive starpositive star
5
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
The Surly cogs and the spacer set make it easy to adjust and get the chainline dead straight.

Yes, I would recomend this to a friend.

Likes: Simplicity, Installation, High Quality, Value

Works For: Mountain Biking

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positive starpositive starpositive starpositive starpositive star
5
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
beautiful construction and nice design. very happy with this item.

Yes, I would recomend this to a friend.

Works For: Mountain Biking

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5
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
Surley's single speed parts have consistently impressed me with their build quality. These cogs are tough and resilient. They ride smooth also. Ive got mine on a converted Giant I've done with a singleator. Works great as a city bike and a mountain bike. I ride in western north carolina, and the bike is rigid so it takes a pretty good beating.

Yes, I would recomend this to a friend.

Likes: Simplicity, Installation, High Quality, Value

Works For: Mountain Biking, Road, Conversions

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positive starpositive starpositive starpositive starpositive star
5
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
These are the best on the market. They last forever (I have over 2000 training/racing miles on my 17t and it will be good for another 2000). They are much quieter than the cheap stamped-style, and the wider profile on the spline really does save your rear hub. I will never buy anything else!

Yes, I would recomend this to a friend.

Likes: High Quality

Works For: Mountain Biking, Conversions

member review badge
positive starpositive starpositive starpositive starpositive star
5
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
Great strong cog. They're thick and won't tear into your freehub body like many other cogs. I run Surly cogs on all of my single-speed bikes. I've never had to replace one either. A very inexpensive upgrade to any SS.

Yes, I would recomend this to a friend.

Likes: High Quality, Value

Works For: Mountain Biking, Road

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5
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
Simple part, does a great job. Wide base prevents hub damage and cog is offset for even more chain line adjustability.

Yes, I would recomend this to a friend.

Likes: High Quality, Simplicity

Works For: Mountain Biking, Conversions

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5
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
Dropped from an 18t to 17t on my Kona UNIT SS to make it more cruiser friendly when I ride with my bride. Made a big difference, but I might get a 16t eventually. Also, I didn't have a spanner wrench, so I used a brass drift to turn the nut and it worked great, although the bike is fairly new.

Yes, I would recomend this to a friend.

Likes: High Quality, Installation, Simplicity

Works For: Conversions

member review badge
positive starpositive starpositive starpositive starpositive star
5
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
Stout cog. Runs smooth. Not sure about the holes; thinking they might make it a tad awkward to clean. Seems strange that Surly would employ such weight saving measures.

Yes, I would recomend this to a friend.

Likes: Simplicity, High Quality, Installation, Value

Works For: Mountain Biking

member review badge
positive starpositive starpositive starpositive starpositive star
5
GEARS
reviewed by:
Review of the Surly Single Speed Cassette Cog:
Solid component. You can buy fancier, lighter or more expensive cogs but these are strong and dependable. I've used them on a couple of my bikes without any issues... ever.
IMHO, Surly cogs are worth every penny and represent a good value.

Summed up: A good value and a dependable part.

Yes, I would recomend this to a friend.

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