Jumping new chain and buying a replacement cassette

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doffcocker
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Jumping new chain and buying a replacement cassette

Postby doffcocker » 14 Jan 2021, 11:57am

Hi all,

One of the many recent jobs I have carried out on my bike after my Halfords assessment includes yesterday replacing my chain which appeared to have gone relatively smoothly until I was out on the road and a select few of the gears caused the chain to jitter. I have read that this is common after replacing a chain and usually means investing in a new cassette. I'm aware there could be other causes but I'm actually keen to try out a new one regardless considering it looks like it is discolouring slightly as though it is on it's way to rusting slightly and I was already experiencing shifting problems before replacing the chain despite having installed new cables.

Does this sound like a sensible enough idea?

Anyroad, I was wondering if anybody had any further advice on what specifications to look for when buying. It seems the bike is no longer stocked by Argos so instead I have found a link to a page on ebay where the specifications are listed:

https://www.ebay.co.uk/itm/Challenge-Dy ... 2774153147

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531colin
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Re: Jumping new chain and buying a replacement cassette

Postby 531colin » 14 Jan 2021, 1:38pm

First you have to check if its a cassette or a screw on block .....https://www.sheldonbrown.com/free-k7.html
Other than that, you know its 8 speed, just count the teeth and off you go.
If your gears are slipping due to running a new chain on old sprockets, you may find that it "wears in" after a bit and stops slipping.

Jdsk
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Re: Jumping new chain and buying a replacement cassette

Postby Jdsk » 14 Jan 2021, 4:16pm

There are quite a lot of possibilities so that it's hard to know where to start...

How about:
* Cleaning and inspecting the chain and looking for stiff links. And measuring it for stretch (as in those linked sites).
* Looking for damaged teeth.
* Getting it on a stand and watching the chain, including as you change gear.
* Checking the action of the front and rear changers.

Jonathan
Last edited by Jdsk on 14 Jan 2021, 4:54pm, edited 1 time in total.

doffcocker
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Joined: 31 Aug 2020, 8:49pm

Re: Jumping new chain and buying a replacement cassette

Postby doffcocker » 14 Jan 2021, 4:41pm

To be more specific, what I found was the problem was worst when sprinting in the highest two gears so it's not apparent at all when just pedalling by hand on the stand.

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531colin
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Re: Jumping new chain and buying a replacement cassette

Postby 531colin » 14 Jan 2021, 4:53pm

doffcocker wrote:To be more specific, what I found was the problem was worst when sprinting in the highest two gears so it's not apparent at all when just pedalling by hand on the stand.

OK, that does sound like worn sprockets/new chain.
But Jonathan is right, there are other possibilities.
If you used a "magic link" to join the new chain, you shouldn't have any stiff links.
It could be what they call "ghost shifting" where the indexing adjustment isn't quite spot on, and its trying to change to a different gear....but if its just the 2 smallest sprockets, and only when you are pedalling hard, its likely to be the worn sprockets/new chain business.
Its also quite likely to "wear in" fairly quickly; if the sprockets are badly worn, you can get jumping in all several gears even when you aren't pedalling very hard.

doffcocker
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Joined: 31 Aug 2020, 8:49pm

Re: Jumping new chain and buying a replacement cassette

Postby doffcocker » 14 Jan 2021, 5:00pm

Cheers.

I have taken the wheel off today and the engraving on the cassette reads Shimano CS-HG5-10.

In terms of replacing it, I must admit I'm struggling to identify exactly whether it is a freewheel, cassette, freehub etc. based on the link kindly provided. What do we reckon?

Brucey
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Re: Jumping new chain and buying a replacement cassette

Postby Brucey » 14 Jan 2021, 5:05pm

CS means it is a cassette, but the markings on the lockring don't make sense to me, being closest to those seen on a 10s cassette.

Any chance of a photo?

cheers
-------------------------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~


doffcocker
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Joined: 31 Aug 2020, 8:49pm

Re: Jumping new chain and buying a replacement cassette

Postby doffcocker » 14 Jan 2021, 5:15pm

Hope these help.

Cheers.
Image Attachments
cass.jpg
cas2s.jpg

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531colin
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Location: North Yorkshire

Re: Jumping new chain and buying a replacement cassette

Postby 531colin » 14 Jan 2021, 5:28pm

Cassette
I read it as CS HG 50

doffcocker
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Re: Jumping new chain and buying a replacement cassette

Postby doffcocker » 14 Jan 2021, 5:47pm

Cheers.

I haven't counted the teeth yet, but in any case this is one I've got my eye on assuming everything adds up.

https://www.amazon.co.uk/11-32T-Freewhe ... s9dHJ1ZQ==

Thoughts

Brucey
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Re: Jumping new chain and buying a replacement cassette

Postby Brucey » 14 Jan 2021, 6:01pm

er, no-name and about twice the price of a shimano one? eh?

Also what ratios do you have currently, and do they really suit you?

You could change to something different, provided the derailleur capacity is OK.

cheers
-------------------------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

doffcocker
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Re: Jumping new chain and buying a replacement cassette

Postby doffcocker » 14 Jan 2021, 6:18pm

Brucey wrote:er, no-name and about twice the price of a shimano one? eh?

Also what ratios do you have currently, and do they really suit you?

You could change to something different, provided the derailleur capacity is OK.

cheers


I do think my current setup suits my riding style perfectly, I just want to get it to work smoother.

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cycleruk
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Re: Jumping new chain and buying a replacement cassette

Postby cycleruk » 14 Jan 2021, 6:28pm

Not easy to count but seems to be an 11/28 teeth. Looked at Wiggle and Merlin and both report 8 speed out of stock as does SJS. :?
Spa cycles:-
https://www.spacycles.co.uk/m8b0s150p26 ... pd-CS-HG50
You'll never know if you don't try it.

Jdsk
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Re: Jumping new chain and buying a replacement cassette

Postby Jdsk » 14 Jan 2021, 6:32pm

At SJS I see:

Screenshot 2021-01-14 at 18.30.35.png

Is it "Out of stock" if you actually try and buy one... different from "Currently unavailable"?

Jonathan