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Shimano-compatible 10-speed Cassettes

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by Sheldon "Kah Sept" Brown
and John "Dix Donc!" Allen
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Cassettes for sale from Harris Cyclery

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This article is your guide to work on Shimano and Shimano-compatible 10-speed cassettes (sprocket clusters) -- identifying stock cassettes, replacing worn sprockets and building custom combinations. The tables below list current models from major brands, and some discontinued models.

Another article on this site gives more general information about cassettes, and on how to upgrade from an older cassette.

In case you're not sure whether your bike has a cassette Freehub or a thread-on freewheel, we have a separate illustrated article explaining how to tell them apart.

Cassettes listed in the table below will fit most Shimano and Shimano-compatible Freehub bodies, with the following exceptions:

Colored backgrounds in the cells of the tables below identify assemblies of two or more sprockets on a spider to save weight. The lighter cassettes are more expensive, sometimes much more, so you really have to decide for yourself how important it is to save a few ounces. Sprockets on a spider can not be separated from one another, so you will have to replace all of them even if you only wear out one of them! They can be replaced by flat steel sprockets with spacers sandwiched between them, and vice versa. Assemblies of the same sprocket sizes shown in the same background color are compatible with one another, though they may differ in materials and finish.

Some Shimano flat steel sprockets and spacers are in bolted or riveted assemblies, indicated by tooth counts in italics in the table. The bolts or rivets only serve to keep sprockets and spacers in order when the cassette is not installed on the freehub. They can be removed to replace sprockets or build up custom combinations.

Model numbers covered in current (2010) Shimano product literature are in boldface, like this: CS‑7800.

The ramps and shaped teeth of Shimano Hyperglide sprockets, and their imitations, are designed to improve shifting in the stock progressions, but it is possible to mix and match sprockets with some small penalty in smoothness of shifting. Miche sprockets are available individually in all sizes, useful in building up a custom progression.

The Shimano parts lists linked below will help you identify models and order replacement parts.

SRAM, IRD and SunRace also offer 10-speed Shimano-compatible cassettes -- see additional sections that follow the Shimano section.

Harris Cyclery sells some but not all Shimano 10-speed cassettes. The table below, though, is a complete as it can be made as of November, 2010, in order to indicate compatibility and interchangeability. The table, unlike others, shows both "road" and "mountain" cassettes.

Click here for current stock at Harris Cyclery

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Shimano parts lists

Dura Ace CS-7900
Dura Ace CS-7800
Ultegra CS-6700
Ultegra CS-6600
105 CS-5700
105 CS-5600
CS-M771
CS-HG81

Shimano 10-speed combinations

Code 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 33 34 36
Dura-Ace
CS-7900
CS-7800
11 12 13 14 15 16 17 18 19 21
Dura-Ace
CS-7900
CS-7800
11 12 13 14 15 16 17 19 21 23
Ultegra
CS-6700
CS-6600
CS-5600
11 12 13 14 15 16 17 19 21 23
Dura-Ace
CS-7900
11 12 13 14 15 17 19 21 23 25
Ultegra
CS-6700
CS-5700
CS-5600
11 12 13 14 15 17 19 21 23 25
Dura-Ace
CS-7900
CS-7800
11 12 13 14 15 17 19 21 24 27
Ultegra
CS-6700
CS-5700
11 12 13 14 15 17 19 21 24 28
XT bL
CS-M771
11 12 14 16 18 20 22 25 28 32
XT bj
CS-M771
11 13 15 17 19   21 23 26 30 34
XT bj
CS-HG81
11 13 15 17 19   21 23 26 30 34
XT bk
CS-M771
11 13 15 17 19 21 24 28 32 36
XT bk
CS-HG81
11 13 15 17 19   21 24 28 32 36
Dura-Ace
CS-7800
12 13 14 15 16 17 18 19 20 21
Dura-Ace
CS-7900
CS-7800
12 13 14 15 16 17 18 19 21 23

Ultegra
CS-6700
CS-6600

12 13 14 15 16 17 18 19 21 23
Dura-Ace
CS-7900
CS-7800
12 13 14 15 16 17 19 21 23 25
Ultegra, 105
CS-6700
CS-6600
CS-5700
CS-5600
12 13 14 15 16 17 19 21 23 25
Dura-Ace
CS-7900
CS-7800
12 13 14 15 16 17 19 21 24 27
Ultegra, 105
CS-6600
CS-5700
CS-5600
12 13 14 15 16 17 19 21 24 27
Ultegra
CS-6600
13 14 15 16 17 18 19 21 23 25
Ultegra
CS-6600
14 15 16 17 18 19 20 21 23 25
Ultegra
CS-6600
15 16 17 18 19 20 21 22 23 25
Ultegra
CS-6600
16 17 18 19 20 21 22 23 25 27
Code 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 33 34 36
Sprockets shown in color are probably interchangeable with other same-size sprockets shown in the same color.
(Not all of these have been checked). Most individual 10-speed sprockets 16 teeth or smaller are interchangeable between series.
Sprockets shown with the same background color are attached to a spider assembly and can not be separated. Others may be riveted or bolted together, but the rivets or bolts can be removed to use the sprockets in other combinations.

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IRD 10-speed combinations

IRD has many combinations that are different from Shimano's. Some combinations are rather nice, and others have some uneven steps.

ES series cassettes have the four largest sprockets on aluminum spiders, two sprockets each. The spiders are indicated by background colors in the table below. These 10 speed cassettes fit all Shimano Freehub bodies including aluminum ones with tall splines.

Two-sprocket spider assemblies must be recessed on the back side so the innermost sprocket overhangs the flange of the Freehub body. I haven't checked them so I don't know for sure whether all are recessed. If so, all with the same tooth counts will work either in the innermost or middle positions

As of this writing, Harris Cyclery does not sell IRD cassettes, but they are included here for the sake of completeness -- John Allen.

IRD Web page describing cassettes

Code 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 34
11‑23 ES 11 12 13 14 15 16 17 19 21 23
11‑25 ES 11 12 13 14 15 17 19 21 23 25
11‑25 CS 11 12 13 14 15 17 19 21 23 25
11‑28 ES 11 12 13 15 17 19 21 23 25 28
11‑28 CS 11 12 13 15 17 19 21 23 25 28
11‑30 ES 11 13 15 17 19 21 23 25 28 30
11‑32 ES 11 13 15 17 19 21 23 25 28 32
11‑34 ES 11 13 15 17 19 21 23 25 28 34
12‑23 ES 12 13 14 15 16 17 18 19 21 23
12‑23 CS 12 13 14 15 16 17 18 19 21 23
12‑25 ES 12 13 14 15 16 17 19 21 23 25
12‑25 CS 12 13 14 15 16 17 19 21 23 25
12‑28 ES 12 13 14 15 17 19 21 23 25 28
12‑28 CS 12 13 14 15 17 19 21 23 25 28
12‑30 ES 12 13 15 17 19 21 23 25 28 30
12‑32 ES 12 13 15 17 19 21 23 25 28 32
13‑25 ES 13 14 15 16 17 18 19 21 23 25
Code 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 34
Sprockets shown with the same background color are attached to a spider assembly and cannot be separated. Others may be riveted or bolted together, but the rivets or bolts can be removed to use the sprockets in other combinations.

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Miche 10-speed Combinations

Miche makes cassettes to fit Shimano hubs. Miche also offers individual sprockets in all sizes, useful in building up custom combinations. One of the combinations indicated below is rather odd, suggesting that it might have been assembled from whatever sprockets happened to be lying around, and that others might be available already made up. Harris Cyclery sells only the individual Miche sprockets, but these cassettes are included for the sake of completeness.

Code 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 34
11 12 13 14 15 17 19 21 23 25
  11 12 13 15 16 19 21 23 25 27
12 13 14 15 16 17 19 21 23 26
  12 13 14 15 17 19 21 23 25 27
Sprockets may be riveted or bolted together, but the rivets or bolts can be removed to use the sprockets in other combinations.

SRAM 10-speed Combinations

Harris Cyclery sells a few SRAM cassettes, where they fill in gaps in Shimano's offerings.

Note: Some SRAM cassettes do not work with Shimano aluminum Freehub bodies that have tall splines.

At least some OpenGlide (OG) series cassettes skip teeth on some or all sprockets. The skip-tooth cassettes are reputed to shift more smoothly, but to be noisy, probably due to roughness of chain disengagement from sprockets under power when the chain is at an angle.

It is probable that all of the 3-sprocket spider assemblies which start with 21-tooth sprockets are interchangeable without compromising smoothness of shifting.

SRAM 2011 technical specs listing 10-speed cassettes (see pages 18 ff.)
SRAM 2011 technical manual with information on XG-1099 cassettes (see pages 28-29).

Code 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 34 36
OG‑1090 11 12 13 14 15 16 17 19 21 23
OG‑1070 11 12 13 14 15 16 17 19 21 23
PG‑1070 11 12 13 14 15 16 17 19 21 23
PG‑1050 11 12 13 14 15 16 17 19 21 23
OG‑1070 11 12 13 14 15 17 19 21 23 25
PG‑1070 11 12 13 14 15 17 19 21 23 25
OG‑1090 11 12 13 14 15 17 19 21 23 26
OG‑1070 11 12 13 14 15 17 19 21 23 26
PG‑1070 11 12 13 14 15 17 19 21 23 26
PG‑1050 11 12 13 14 15 17 19 21 23 26
OG‑1070 11 12 13 14 15 16 18 21 24 28
PG‑1070 11 12 13 14 15 16 18 21 24 28
PG‑1050 11 12 13 14 15 17 19 22 25 28
PG‑1050 11 12 14 16 18 20 22 25 28
XG‑1099 11 12 14 16 18 20 22 25 28 32
XG‑1080 11 12 14 16 18 20 22 25 28 32
PG‑1050 11 12 14 16 18 20 22 25 28 32
XG‑1099 11 12 14 16 18 21 24 28 32 36
XG‑1080 11 12 14 16 18 21 24 28 32 36
OG‑1070 12 13 14 15 16 17 19 21 23 25
PG‑1070 12 13 14 15 16 17 19 21 23 25
OG‑1070 12 13 14 15 16 17 19 21 23 26
PG‑1070 12 13 14 15 16 17 19 21 23 26
OG‑1070 12 13 14 15 16 17 19 21 24 27
PG‑1070 12 13 14 15 16 17 19 21 24 27
PG‑1050 12 13 15 17 19 21 24 28 32 36

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SunRace 10-speed combinations:

For SunRace cassettes with flat sprockets that skip the same sprocket sizes, it is fair to assume that the sprockets are interchangeable while maintaining smooth shifting.

As of this writing, Harris Cyclery does not sell SunRace cassettes. They are included here for the sake of completeness.

The different model numbers with the same tooth counts differ in materials:

CRSZ: One-piece aluminum CNC, ceramic coating
CRSX: Steel sprockets, largest two sprockets on a spider, aluminum spacers
CSRS: Steel sprockets, largest two sprockets on a spider, polymer spacers

SunRace 2010-2011 catalog

Code 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 34
CRSZ TAO 11 12 13 14 15 16 17 19 21 23
CRSX TAO 11 12 13 14 15 16 17 19 21 23
CSRS TAO 11 12 13 14 15 16 17 19 21 23
CRSX TAQ 11 12 13 14 16 17 19 21 23 25
CSRS TAQ 11 12 13 14 16 17 19 21 23 25
CRSZ TBO 12 13 14 15 16 17 18 19 21 23
CRSZ TBQ 12 13 14 15 16 17 19 21 23 25
CRSX TBQ 12 13 14 15 16 17 19 21 23 25
CSRS TBQ 12 13 14 15 16 17 19 21 23 25
CRSX TBR 12 13 14 15 16 17 19 21 24 27
CSRS TBR 12 13 14 15 16 17 19 21 24 27
SunRace cassette individual sprockets and spiders are compatible with Shimano. Shifting will not be as smooth when mixing brands in the same cassette.

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Building Custom Cassettes

Shimano wants you to use one of its standard combinations, and offers a wide-enough choice to suit the needs of most cyclists, but you don't have to if you don't want to!

It is not difficult to customize Shimano cassettes. If you substitute an un-approved cog, Uniglide or Hyperglide, SRAM, SunRace, IRD, Miche, or some other brand, it will still work, but the shift to/from that cog will probably not be as smooth as a Hyperglide shift normally is. Since people managed without Hyperglide for several decades, this shouldn't scare you off. In particular, if you substitute the top or bottom sprocket, you will only have one shift that isn't HG; shifts to or from the extreme sprockets tend to be less troublesome than intermediate shifts anyway.

Shimano cassettes that don't use spiders have most of the sprockets held together by 3 small bolts or rivets. These are not essential. Their function is convenience, in allowing the cassette to be installed slightly more easily. To make a custom cassette, you will often need to remove the screws or rivets. Just discard them, they are unnecessary in practice.

When you build your own cassette, generally, the smallest sprocket needs to be one with a built-in spacer, designed for the top-gear position. While you can't insert or remove a sprocket within a spider module, you can add sprockets on either side of these modules.

Sprockets are available individually, too:

Loose sprockets for sale from Harris Cyclery

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