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Shimano and SRAM
Cassette gear clusters from Harris Cyclery

cassette
This site includes a more detailed technical page about Shimano Cassettes.

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7-speed Cassettes | 8-speed Cassettes | 9-speed Cassettes | 10-speed Cassettes

Capreo® | Chains | Spacers | Thread-on Freewheels

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It is generally good practice to replace your chain when you install a new cassette. We recommend SRAM (Formerly Sachs (Formerly Sedis)) chains to our Web customers. Click here for details.
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7-speed:

Standard Shimano 7-speed Cassettes:
The HG-50 series is still made in Japan, hence the higher price.
Part
Number
SeriesPriceSprocketsWeight
New!
CS725
HG-41
Silver
$19.95 buy button11131518212428226 grams
CS728HG-50
Silver
$31.95 buy button12131415171921220 grams
CS730HG-50
Silver
$31.95 buy button12141618212428301 grams
CS732HG-50
Silver
$31.95 buy button13141517192123262 grams
CS733HG-50
Silver
$31.95 buy button13151719212326311 grams
CS735HG-50
Silver
$31.95 buy button13151719212428328 grams
CS737HG-50
Silver
$31.95 buy button13151720232630328 grams
CS738HG-50
Silver
$31.95 buy button13151720242934405 grams
CS739HG-50
Silver
$31.95 buy button14161821242832360 grams

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Spacers

4.5 mm spacer to fit a 7-speed cassette onto a hub made for 8-, 9-, or 10-speed cassettes. CS004 $5.95 buy button

Spacer Kits

Convert a 7- or 8-/9-speed Shimano Freehub to singlespeed

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8-speed:

Shimano 8-speed Cassettes:
Part
Number
SeriesPriceSprockets
CS819HG51-8$29.95 buy button1113151719212428DESCRIPTION
CS823HG51-8$29.95 buy button1113151720232630DESCRIPTION
CS825HG51-8$29.95 buy button1113151821242832DESCRIPTION
CS827HG41-8$24.95 buy button1113151720232634DESCRIPTION
CS832HG50-8$41.95 buy button1314151719212326DESCRIPTION

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9-speed:

Note: Shimano 8- and 9- and 10-speed cassettes/hubs are fully interchangeable for wheels with steel Freehub bodies.
The only parts that are different in any important way between the 8- and 9- and 10-speed systems are the shift control levers.

Harris Cyclery Exclusive
Custom 9-speed Cassettes by Sheldon Brown:

(NOTE: These are the only custom cassettes we make. Please do not ask about making others.)
These cassettes are based on an Ultegra 6500 cassette, rearranged to offer gearing options not otherwise available.

Note that Shimano's capacity recommendations for their various derailers are very conservative.
They can often be exceeded to a considerable extent. See my Bicycle Glossary's "Capacity" entry for a detailed explanation of this.

CS922 Century Special    $119.95 buy button

The "Century Special" is our most popular custom cassette.
It works with all modern derailers, even short cage models

131415171921242730DESCRIPTION
CS914 Century "12"       $115.95 buy button

By popular demand, 12-30 range. You give up the 14 of the Century Special for the 12.

121315171921242730DESCRIPTION
CS923 Cyclotouriste 13   $128.95 buy button

Excellent choice for loaded touring bikes with full-sized chainrings,
giving excellent climbing gears without sacrificing comfortable gear spacing for useless high end gears.

131517192124273034DESCRIPTION
CS925 Cyclotouriste 14   $128.95  buy button

Excellent choice for loaded touring bikes with full-sized chainrings,
giving excellent climbing gears without sacrificing comfortable gear spacing for useless high end gears.

141517192124273034DESCRIPTION

Standard 9 Speed Shimano Cassettes
Part
Number
SeriesPriceSprocketsWeight
CS913Ultegra 9$99.95 buy button121314151719212427224 grams
CS902HG-80$69.95 buy button111213141618212428N/A
CS903HG-400$39.95 buy button111214161821242832N/A
CS906HG-400$39.95 buy button111315172023263034N/A
CS916AHG-400
12-36t
$39.95 buy button121416182124283236Designed for 29ers.
Makes a great touring cassette!
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10-speed:

Note: Shimano 8- and 9- and 10-speed cassettes/hubs are fully interchangeable for wheels with steel Freehub bodies.
The only parts that are different in any important way between the 8- and 9- and 10-speed systems are the shift control levers.

The 2004 Dura-Ace hub has an aluminum Freehub body, so it only works with 10 speed cassettes.

This is not true of the Ultegra 10 hub. The Ultegra 10 will take any standard Shimano cassette.

Dura-Ace 10 cassettes have titanium sprockets from 18 teeth and larger.

We do not make custom 10-speed cassettes:
10-speed cassettes have a recess built into the back of the big spider module, allowing them to fit farther onto the Freehub body than older cassettes.
This limits the possiblities of customizing the ratios, because you can't install a flat sprocket behind the spider module...you run out of clearance at the other end if you try.


Standard Shimano 10 Speed Cassettes
Part
Number
SeriesPriceSprocketsWeight
CSX13Ultegra 10
6700 Series
$89.95 buy button 11121314151719212428238g
CSX149Tiagra 10
4600 Series
$45.95 buy button 12131415171921242730N/A
Harris "Century 12" Gearing in an affordable, stock 10 Speed Shimano Cassette!

The Ultimate 10-Speed Touring Cassette!

Designed for Shimano's Shadow technology Mtn Bike components, This cassette can be used on a touring bike
with a traditional Deore MTB rear derailleur by replacing the B tension screw with a 4mm x 20mm bolt.
We tested the set-up on a Gunnar with 105 STI 5600 levers and it shifted flawlessly!

Part
Number
SeriesPriceSprocketsWeight
CSX145SLX
HG81
$69.95  buy button 11131517192124283236364g

11 Speed Cassettes

We do not currently stock 11 speed cassettes. Please check our Special Order Catalog

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11 tooth sprockets

Cassettes that feature an 11 tooth sprocket are intended to fit "C" (Compact) hub bodies only. The spline grooves in the 11 do not run all the way through (it wouldn't be strong enough if they did.)

These cassettes can be fitted onto older bodies two ways:

  • If you install a 1 mm spacer before the cassette, the cassette will fit, but the cassette will then be 1 mm farther to the right than it is intended to be. With most bikes, this won't be a problem, but if your frame has very tight clearance, or if you want to be able to interchange multiple rear wheels without having to re-adjust the derailer, this could be a problem.

  • You can convert an older Freehub body to work with "C" type cassettes by grinding off the outer corners of the splines so that the 11 can fit on far enough to hold the rest of the cassette in place.
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Chains

It is generally good practice to replace your chain when you install a new cassette. We particularly recommend SRAM (Formerly Sachs (Formerly Sedis)) chains. Click here for details.
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