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My chain broke and in a moment of silliness (I was cold wet and slightly annoyed) I threw the broken one away before thinking about measuring the new one.

Is there a guide to getting the chain length/tension correct ?

It's an 8 speed road bike (Shimano Sora back, double ring front)

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1 Answer 1

up vote 8 down vote accepted

Put the chain around the big-big gears without threading it through the derailleur. Have the chain overlap by one link. Now with that length thread it through the derailleur.

http://sheldonbrown.com/derailer-adjustment.html#chain

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How did I miss that - I checked the great prophet sheldon's site. My Zinn book talked about the one extra link - but implied that a link was half of the link-pair that the sheldon picture shows. –  mgb Dec 14 '10 at 16:50
    
Most people consider that 2 links, including Shimano. –  zenbike Aug 7 '11 at 14:38
    
@zenbike So the correct overlap is two half-links or one full-link (depending on which definition of link you use), right? –  amcnabb Jun 3 '13 at 19:11
    
One outer and one inner link. If you consider a single inner or outer to be 'one link' you cannot connect the chain. you'd have to use a special 'half link' to do so. –  whatsisname Jun 3 '13 at 21:51
    
Yes, that's correct. –  zenbike Jun 4 '13 at 16:46
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