Is there a way to determine correct chain length?

rumbataz

So here's a hypothetical situation: the chain on your bike has been put on my someone who found a chain lying around and it may or may not be of the correct length. It's now worn so needs to be replaced.

You buy a new chain but don't want to use the old one as guidance for the correct length.

How do you determine what the correct length is for a chain?

JackPozzi

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

TBH if the chain that's on there has been working without issues, I'd just go with the same length though

rumbataz

Thank you for that link. The maths is fascinating!

arlowood

Another "ready reckoner" that I use:-

http://www.machinehead-software.co.uk/bike/chain_length/chainlengthcalc.html

Work every time for me.

sungod

[url=http://www.bikeradar.com/forums/viewtopic.php?p=19766305#p19766305]rumbataz[/url] wrote:

How do you determine what the correct length is for a chain?

you follow the instructions given by the manufacturer of the rear mech

for instance http://si.shimano.com/