Chain length

dragonontheedge

I am currently running Ultegra 6800 50/34 up front and a 12/27 (if I remember correctly) out back with a short cage derailler.

I am off to the Alps in June and have puechased a dinner plate sized 11/32 rear cassette with a new medium cage derailler. I have also treated the bike to a new chain which is currently 116 links long and not fitted.

Is there a trick to getting the chain length correct please.

Any assistance and advice would be very gratefully received.

Thanks in advance

Al

dowtcha

There are a few online calculators
http://www.machinehead-software.co.uk/bike/chain_length/chainlengthcalc.html

dragonontheedge

Excellent, thank you.

keef66

Or Shimano's traditional advice for a double chainset:

Wrap the chain round the biggest chainring and biggest sprocket but not through the rear mech, then add a link (1 inch, ie inner plus outer)

Obviously then go back and thread it through the rear mech before joining it.

Then check that you can actually engage the bib-big combination without the upper jockey wheel hitting the cassette. Adjust the B screw if required.

And then try not to use this gear combination ever again!

dragonontheedge

Done !

Cheers lads