How many links in the chain do I need

sigorman85

Going from ultegra 50/34 to 53/39 -11/28 would like to no how many links I would need in the chain I've got a new dura ace chain to go on the new set this is ultegra di2 on a derosa superking


Cheers guys

darkhairedlord

Route the chain big big without the rear mech, add one inner and one outer. If in doubt read the manual on the shimano website

sloppyschleckonds

I took 2 links out going from a 53 to a 50.

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

rower63

I used the equation method below on a new rear wheel after I destroyed a rear by putting the RD through the spokes as a result of chain-jamming due to insufficient length after I inadvertently changed to big/big. It was a warranty-replacement frame and I hadn't realized they had changed the geometry - longer chainstays - and it caught me out.

http://www.parktool.com/blog/repair-help/chain-length-sizing#article-section-4

drlodge

I prefer the small-small method - run the chain through the smallest chainring and sprocket and remove the fewest links necessary so there's still some tension in the chain and the rear derailleur is taking up a wee bit of slack.

rower63

drlodge wrote:

I prefer the small-small method - run the chain through the smallest chainring and sprocket and remove the fewest links necessary so there's still some tension in the chain and the rear derailleur is taking up a wee bit of slack.

yes but you MUST do the big/big test as well, that's the one that could kill you if what happened to me happens to you in an unlucky environment

Sutton_Rider

Try this:
http://www.machinehead-software.co.uk/b ... lator.html