3. How to Replace a Cassette Cluster

Applies to most Shimano cassette/freehub combos (not freewheels).

IMPORTANT: Nuts and bolts on your bike should always be tightened to the manufacturer's specifications.
How to Replace a Cassette Cluster
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Today we’re going to replace a common rear cassette cluster. It’s actually quite a straight forward procedure, but you will need a couple of special bike tools for the job: a chain whip and a lock ring tool. Some lock ring tools have a built in handle, but the one we are using today is most common, and requires the use of a large wrench or vise clamp to hold it in place.

Cassette Removal

The first step is to wrap the chain whip around one of the bigger sprockets. This basically holds the cassette body firmly in place while we loosen the lock ring. Next, insert the lock ring tool into the lock ring’s inner notches and place a wrench securely over the hexagonal fitting.

As you can see in the video, I’ve positioned both tools to give me maximum leverage. Now simply push the handles toward each other until the lock ring loosens. Once you remove the lock ring the rest of the cassette should easily slide up and off the freehub body. Since the cassette is removed, it’s a good idea to check the freehub body to make sure it spins freely and is not loose.

Click on this image to visit Sheldon Brown’s page on this topic:
Cassette Freewheel

Cassette Installation

Installing the new cassette is basically the opposite procedure. Take a close look at the splines on the freehub and cassette. You’ll notice that one of the notches on the body and cassette is wider than the rest. Once the notches are lined up, simply slide on the cassette body, spacer and outer sprocket, and then thread the lock ring into place.

This time we only need the lock ring tool for tightening. We certainly don’t want the cassette coming loose, so it’s a good idea to stand the wheel up, so we get enough downward leverage to tighten it properly. You’ll hear the lock ring ratcheting as it tightens.

Once installed, check again to make sure the cassette spins freely and is not loose. It’s also a good idea to examine your sprocket spacing to make sure all of the sprockets are correctly positioned. If it all looks good then you’re ready to reinstall your wheel and go for a ride!

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10/21 Question about chain length

Hi I have bike called specialized secteur 2013
Did on it 4500 miles and wanted to replace a few parts. Chainring, cassette and chain

I replaced cassette from 12-25 to 11-28, chainring will stay the same I mean 50t. And new chain kmc x9

Can someone please tell me how long chain should be for 11-28 cassette and 50t chainring?

Rear Derralieur is standard sora.


Thanks... Read more >>

10/14 Shimano MF-HG20

Does anyone know how I remove this freewheel?

I can't figure out what park removal tool is required. Is there something more that is necessary?... Read more >>

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Hi,

I have been doing some work on my bike to get it back in shape. Everything is working perfectly except when im using the high gears the chain become loose.

I also notice that it occurs when im only resting my feets on the pedals. But when I remove my feets from the pedal I notice that the slack from the chain goes away but my pedals are moving forward of it's own. I think that is the problem. Because the whole pedal section should be still and not moving forward of it's own when im in motion.

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... Read more >>

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I have ridden my bike, a 1995 Mongoose Alta, for the past 20 years and replaced just about every component on it except for the frame, FD and front wheel. Gone through 3 RDs, several chains, rear hub, both shifters, etc. I'd estimate it's lasted at least 30k miles. I put road slicks on it and use it as my daily commuter, going 10 miles/day now. Love the bike!

Last week, the chain started skipping when I pedaled har... Read more >>

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I'm stuck with a problem of chain slipping on my old bike that i wanted to fix myself.

I changed the whole drivetrain and maybe this is as simple as a mismatch since i have about zero experience in bike maintenance, i tought you would know for sure.

Here are the components i chose to put on based on 8 speed compatibility and cheapness:
Front Derailleur: Shimano Acera FD-M360-6
Rear Derailleur: Shimano Acera RD-M360-SGS
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09/02 How To change a Suntour Cassette to a Shimano

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I have a 1992 Trek 6000 with the original Suntour AP II 12-30 7 Speed Cassette.

It's now time to upgrade the cassette to something newer. Is it possible to change the hub as well as the cassette with another Manufacturer?... Read more >>

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I have a 2011 specialized secteur that came with sora groupset on it.
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08/10 When to lube new chain?

I installed a new Shimano chain 2 weeks ago and before each ride I wipe the chain dry with a clean rag until no oil transfers to my finger when I touch it. After my ride, the chair leaves a black smudge when I touch it. So far all my rides have been in dry conditions

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