Snapped chain

father_jack

Just out riding, chain fell off whilst pedalling. Campagnolo Veloce groupset, 9 speed. Can I buy any 9 speed chain? Also what do I do about fitting (and spare pin) do I need a specific chain tool? Also would like quick link.

How do I work out correct length?

Monty Dog

Depending on how worn the chain is, you could just re-join using a quick-link e.g. KMC, Connex, SRAM. In terms of a replacement, any 9 speed chain is fine - I prefer KMC or Connex. For length, wrap the chain around the big chainring and biggest sprocket only i.e. missing out the rear mech - add one link and then rethread correctly and join.

dennisn

If the old chain was the correct length use it to measrure / compare with the new one.

Bobbinogs

I can recommend the KMC X9L, even comes with a missing link which makes chain removal/cleaning a doddle. Does help to have the Park Chain pliers for removing, but not absolutely necessary.

Erudin

I use a KMC X9 (X9.73) chain with my Campag 9 speed bike. I also like KMC missing links and use them on both my road bikes now and carry spares in my saddlebag. I've found they also work fine on a Shimano 9 spd HG53 chain and Campag C9 chain. I use a BBB Nautilus II Chain Rivet Tool to get a new chain to the right length.


Chain length calculating:

Find the Javascript bicycle chain length calculator is accurate and easy to use (for chainstay length measure center of the rear axle to the center of the crank bolt):

Link: Javascript Bicycle Chain Length Calculator ("rigorous equation")

ParkTools also has a good chain page:

http://www.parktool.com/blog/repair-help/chain-length-sizing

TMR

Erudin wrote:

I use a KMC X9 (X9.73) chain with my Campag 9 speed bike. I also like KMC missing links and use them on both my road bikes now and carry spares in my saddlebag. I've found they also work fine on a Shimano 9 spd HG53 chain and Campag C9 chain. I use a BBB Nautilus II Chain Rivet Tool to get a new chain to the right length.


Chain length calculating:

Find the Javascript bicycle chain length calculator is accurate and easy to use (for chainstay length measure center of the rear axle to the center of the crank bolt):

Link: Javascript Bicycle Chain Length Calculator ("rigorous equation")

ParkTools also has a good chain page:

http://www.parktool.com/blog/repair-help/chain-length-sizing

Very useful post. Chapeau!

father_jack

Picked up a pair of SRAM missing links, chain stretch was "fair" on the chain tool.

Will get one of these, don't want to knacker up cassette/chainring by continuing to use it.

http://www.cyclestore.co.uk/productDeta ... goryID=546

father_jack

this ok too?

http://www.ribblecycles.co.uk/sp/road-t ... 0000000000

Does it come with missing link?

Bobbinogs

Father Jack wrote:

this ok too?

http://www.ribblecycles.co.uk/sp/road-t ... 0000000000

Does it come with missing link?

Yes, and yes.

father_jack

Are chains pretty much the same? This one

http://www.ribblecycles.co.uk/sp/road-t ... 0000000000

Favour a durable chain over a lightleight one (for a tourer)

father_jack

Ok fitted new one (didn't measure) I just copied the number of links from the old chain (links not length)
Having a problem, the rear derailler is kicking forward and something is slipping whilst pedalling. Didn't have that with the old chain. Is the cassette/jockey wheels worn? How long do cassettes last?

I changed the middle ring, chain, and cassette,in one go and I've done at least 2000 miles since then.

I do have a new cassette to try out.

Bobbinogs

I would slowly rotate the chain and see if the jockey wheels kick.  If they do then it is probably a case of stiff links which can be eased off in a couple of ways (I use both the chain tool, with the right hole selected, and the technique of freeing off the link). 

See here if you need more guidance:

http://bicycletutor.com/part/chain/

father_jack

Don't think any stiff links, shorted it then used a missing link so didn't push in a new pin.

rake

Father Jack wrote:

Don't think any stiff links, shorted it then used a missing link so didn't push in a new pin.

probably a worn cassette father. maybe the old chain was over due. did you measure it. 2000 doesnt seem much for a block.

why wont this damn thing quote properly?

father_jack

Middle chainring looks a bit buzzsaw too :-( Can't believe only lasted such a low milage.

father_jack

Looks worn?