New Cassette = New Chain?
Tog
Posts: 4
Hi all,
Background Info:
I'm ressurecting an old saracen detox. I wrote it off 2 years ago by landing the rear cassette sprocket on a concrete ledge, bending the cassette sprocket beyond repair and destroying the freehub mechanism.
My technical skills stretch as far as tuning brakes, so i had the cassette and freehub mechanism totally replaced at my local bike shop. Having been taken for a bit of a trip by the merchant, I have fitted the wheel back onto the bike with the old chain. (so thats a old chain driving a new cassette)
The merchant warned me i would destroy the new cassette if i didnt purchase a new chain off him, though he didnt seem to want to explain how/why. Having ridden the bike a few hundered yards with the new cassette, gear shifts are quit loud and abbrupt.
The cassette sprocket, crank sprocket, chain, and derailler are all 8speed.
Question:
Am i likely to destroy my new cassette using my old chain? (If so why and how)
Or are the loud, abbrupt gear changes the product of it not yet being worn in or tuned properly?
Many thanks in advance, Tog.
Background Info:
I'm ressurecting an old saracen detox. I wrote it off 2 years ago by landing the rear cassette sprocket on a concrete ledge, bending the cassette sprocket beyond repair and destroying the freehub mechanism.
My technical skills stretch as far as tuning brakes, so i had the cassette and freehub mechanism totally replaced at my local bike shop. Having been taken for a bit of a trip by the merchant, I have fitted the wheel back onto the bike with the old chain. (so thats a old chain driving a new cassette)
The merchant warned me i would destroy the new cassette if i didnt purchase a new chain off him, though he didnt seem to want to explain how/why. Having ridden the bike a few hundered yards with the new cassette, gear shifts are quit loud and abbrupt.
The cassette sprocket, crank sprocket, chain, and derailler are all 8speed.
Question:
Am i likely to destroy my new cassette using my old chain? (If so why and how)
Or are the loud, abbrupt gear changes the product of it not yet being worn in or tuned properly?
Many thanks in advance, Tog.
0
Comments
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you will wear your cassette faster with an old chain. or you can find it jumping off.
get a new chain.
nick
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When you have a new chain + cassette they wear at the same rate. The distance between links increases gradually and so do the troughs between the cassette teeth. So now you have bought a new cassette the old chain doesn't fit quite right. So your cassette is going to go through the wear process very quickly to get the same wear as the chain. Buy a new chain and its problem solved. Buy a new chain 2-3 times a year and a cassette should last a good year's abuse.
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Basically, as the chain wears, it stretches. This means the rivets (and so the spacers which do the pulling on the teeth) move further apart. As you use this longer chain, it wears the cassette so that it also matches the profile of this chain.
When you then put a new cassette on, your chain carries on where it left off, and starts wearing the cassette at a horrendous rate.
In general, the two should be replaced together. Sometimes you can get away with changing just the chain, but not always.
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Ok thanks all New chain it is.
May seem like alot of fuss over œ10/œ15 worth of chain and a 10 minute change over, but i also wanted to make sure the bike shop was mucking me around anymore then they had.0 -
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Tog</i>
Ok thanks all New chain it is.
May seem like alot of fuss over œ10/œ15 worth of chain and a 10 minute change over, but i also wanted to make sure the bike shop wasn't mucking me around anymore then they had.
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i would get a new chain as your old one may not run smooth on your new casset. and if it doesnt sound healthy to ride i always take the bike shops advice
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get a new one the same with lots of things new sproket=new chain , new drive belt=new roller ect0
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<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by ddoogie</i>
When you have a new chain + cassette they wear at the same rate. <hr noshade size="1">
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I know, obviously, that parts wear out and what not, but why should a chain and a cassette wear out at the same rate when they're made of different materials? (Er, aren't they..?)0 -
Your chain will wear quite quickly (or your cassette, depending on which is the better quality I suppose). To compensate, the cassette will wear down accommodate for the increased distance between the links. If they were to wear at different rates it would mean that shifting and general transmission would be graunchy and nasty.
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