Need to replace my chain and cassette. HELP

by Oliver Duffy   April 29, 2013  

Hello people.

For the past couple of rides i've had a bit of noise coming from the cassette whilst pedalling, i've adjusted the derrailers and had little improvement. think the cassette and chain need replacing.

I have no idea what i'm doing.

Here's the spec of the bike: http://www.evanscycles.com/products/genesis/aether-20-2011-road-bike-ec0...

I assume its a 9 speed chain and cassette i need so im considering an ultegra cassette and tiagra chain. i think. What tools do i need to complete this? Am i making the correct assumptions?

Ill be fine doing the work, i can just find a how-to video somewhere. I think GCN posted on a while ago.

Cheers in advance!

4 user comments

Oldest firstNewest firstBest rated

Ok, FIRST thing, Is your chain lubed up?

Secondly, do you have a chain checker? If not, head along to a LBS (Local bike shop) and have them check it it for you. It checks for the stretch and wear of the chain.

Thirdly, If you are at the LBS, get them to have a look at the cassette.

Fourthly, If it does come down to upgrading both, its simple enough, I or many others here can do a step by step instructional for you or there are many video's and text's out there to show you how. Chain is simple, cassette you will need a chain whip and cassette tool.

Fifthly, IF you need to replace both, why not just stick to what you have if its worked this long, why spend more money that you need to?

You can get the cassette for £16 (http://www.chainreactioncycles.com/Models.aspx?ModelID=387) and a SRAM/KMC chain for the same sort of price.

Unless you are looking to gear your bike differently, more climbing range or a lower cog to get a little more speed?

That should get you started, just shout if you want any more info or help along the way Nerd

Gkam84's picture

posted by Gkam84 [8934 posts]
29th April 2013 - 23:48

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Yes, go for it, it's easy.

You need:

A cassette lockring tool, eg:

http://www.chainreactioncycles.com/Models.aspx?ModelID=7975&_$ja=tsid:46412|cgn:Tools+-+Cassette/Chain|cn:Chain+Reaction-UK-PLA-PLA-Eng-DT-SE|kw:24538UK_Pro+Series+Cassette+Lockring+Remover

A very big adjustable spanner

And, either a chain with quick/speed nlinks, or a chain splitter. (your new chain should have a link if you want an easy life. the original chain often doesn't).

PJ McNally's picture

posted by PJ McNally [591 posts]
30th April 2013 - 8:25

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Firstly, measure the chain carefully (under load) with a ruler or chain checker before you do anything. 10 links c-to-c are 25.4 cm when new. Up to 25.5 cm is OK. A bit past 25.5 cm you should replace the chain, but the cassette should be fine. If it is near 25.7 cm you have left it too long, and the most used sprockets will be too badly worn and chain will skip/shift poorly.

The Shimano HG50 Tiagra cassette is as good as Ultegra and a lot cheaper (particularly at wiggle just now). I'd recommend a SRAM PC951 or KMC X9 chain with quick link.

Count the links in your existing chain carefully and shorten the new chain to match. You will need a chain tool to remove pins and a chain whip and cassette tool to remove and refit the cassette.

Simon E's picture

posted by Simon E [2000 posts]
30th April 2013 - 9:49

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You might want to try this web site.....

http://www.parktool.com/blog/repair-help

posted by Bing Bell [8 posts]
30th April 2013 - 11:10

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