The chain will be fine.
Old chains quickly wear out new cassettes, but old cassettes don't rapidly wear out new chains.
Doe my cassette look worn?
- Thread starter nmfeb70
- Start date
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The chain will be fine.
Old chains quickly wear out new cassettes, but old cassettes don't rapidly wear out new chains.
I like Skol
A Minging Manc...
- Location
- Sunny Ashton-under-Lyne
He kept shortening the chain until it was too short. Chain is now in great condition, but unusable.....
Illaveago
Guru
- Location
- Chippenham,Wiltshire.
I would get a round file on it.
Brandane
Legendary Member
- Location
- Costa Clyde
Since the old chain and cassette are running fine (and now re-fitted), and only at 75% worn - why not continue using it like that until 100% worn? Both are going to get binned then anyway. Running the chain to 100% worn is unlikely to cause extra wear to the chain rings in my experience.
Punkawallah
Über Member
I was given to understand if both the cassette and chain were worn out, it’s likely you’ll need a new chainring as well?
Illaveago
Guru
- Location
- Chippenham,Wiltshire.
What more expense!
I would not bother to use top gear and adjust the limit screws.
Brandane
Legendary Member
- Location
- Costa Clyde
I can't see the logic in that. Rings are much longer lasting than chains or cassettes. In fact I cannot remember when I last had to replace a chain ring. 10k miles at a guess on regular Shimano 105 or Tiagra groupsets. They certainly see off many chains and cassettes whether both have been worn or not.
Edit to add.... Unless of course someone has been completely negligent on maintenance and simply run the whole drivetrain into an early grave? I don't know. But I stick to replacing the chain at somewhere between 75% and 100% wear. I get 2, maybe 3 chains replaced before the cassette needs replaced. At that point, obviously both chain and cassette are worn, but that does not mean the chain rings need replaced. They have probably only covered about 6k miles at that point (assuming roughly 2k miles per chain).
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Dogtrousers
Kilometre nibbler
What do you mean by 100% wear?
I have a chain wear gauge but it measures up to (and a bit beyond) 1%. Are other ones calibrated differently?
I have a chain wear gauge but it measures up to (and a bit beyond) 1%. Are other ones calibrated differently?
Unless he kept the links that were removed and can add some back.
Brandane
Legendary Member
- Location
- Costa Clyde
Looking at mine, it is graduated 0.5 and 0.75 (cm of stretch??). So 0.75 would be 100% wear, and 0.5 would be "keep an eye on it and start thinking about ordering a new chain", or 66% of the way to maximum wear. Or something like that!
Sea of vapours
Guru
- Location
- Clapham, Yorkshire Dales
Those graduations are percentages, not actual lengths. And what constitutes '100% worn' is dependent on chain 'speed'. i.e. for 11/12 speed chains 0.5 is said to be 100% worn; at some point below 11, presumably 10, it's said to be 0.75 which constitutes 100% worn.
I've only ever changed one chain because it skipped and it had spent over 3 years on a turbo (maybe > 5k miles).
My chains last upto 2000 miles outdoors. I then bin them. I regularly oil them - which probably contributes to their longevity. Re cassette, never swapped one due to wear
My chains last upto 2000 miles outdoors. I then bin them. I regularly oil them - which probably contributes to their longevity. Re cassette, never swapped one due to wear
OP
OP
nmfeb70
Senior Member
- Location
- Tonypandy, Wales
Nooooo! Shortening a chain is a piece of cake. Adding links is another matter! I always tend to buckle them.
How about adding a couple of quick links to increase the length. Would that work?
