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Shimano Cassette gear clusters from Harris Cyclery

Do you have a freewheel or 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

Chains | Spacers | Thread-on Freewheels

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7-speed:

Standard Shimano 7-speed Cassettes:
The HG-50 series is still made in Japan.
Part
Number
SeriesPriceSprockets
CS725HG-41
Silver
Click for Price & Availability11131518212428
CS730HG-50
Silver
Click for Price & Availability12141618212428
CS732HG-50
Silver
Click for Price & Availability13141517192123
CS733HG-50
Silver
Click for Price & Availability13151719212326
CS735HG-50
Silver
Click for Price & Availability13151719212428
CS737HG-50
Silver
Click for Price & Availability13151720232630
CS738HG-50
Silver
Click for Price & Availability13151720242934
CS739HG-50
Silver
Click for Price & Availability14161821242832

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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

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8-speed:

Shimano 8-speed Cassettes:
Part
Number
SeriesPriceSprockets
CS819HG51-8Click for Price & Availability1113151719212428DESCRIPTION
CS823HG51-8Click for Price & Availability1113151720232630DESCRIPTION
CS825HG51-8 Click for Price & Availability1113151821242832DESCRIPTION
CS827HG41-8 Click for Price & Availability1113151720232634DESCRIPTION
CS832HG50-8Click for Price & Availability1314151719212326DESCRIPTION

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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    Click for Price & Availability

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

131415171921242730DESCRIPTION
CS914 Century "12"        Click for Price & Availability

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

121315171921242730DESCRIPTION
CS923 Cyclotouriste 13   Click for Price & Availability

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    Click for Price & Availability

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 9Click for Price & Availability121314151719212427224 grams
CS902HG-80 Click for Price & Availability111213141618212428N/A
CS905HG-80 Click for Price & Availability111214161821242832N/A
CS903HG-400 Click for Price & Availability111214161821242832N/A
CS906HG-400Click for Price & Availability111315172023263034N/A
CS907AHG-80Click for Price & Availability111315172023263034N/A
CS916AHG-400
12-36t
Click for Price & Availability121416182124283236Designed 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
Click for Price & Availability 11121314151719212428238g

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
Click for Price & Availability 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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