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Chain length
#1
Morning All

Today I decided it was time to finally fit the shiney xtr 970 mech & new chain I've had sat in a box looking at me for the last month.  I thought that as I was putting new parts in I might as well clean the rest of my drive train as well so removed my crank, bb & cassette plunged them into the sink and scrubbed them up but good and (unlike all the kings horses) put everything back together again ;D

When I've fitted a chain in the past I've always put it on big front/small back with the rear mech in place, added one inner and outer and roberts ya' fathers brother.  When I was looking through an old mag though I found mention of not fitting the mech and if its a full suss removing the rear shock  :o

Therefore, how do you do it  Undecided
Ride the Spiral to the end
It takes us to where no ones been
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#2
Assuming you are running a triple, wrap the chain around the big ring front and big ring back without going through the mech, then add 2 links and join together.

If for instance you are running a double and tolerances are close you can check the chain isn't too short by shifting to big/big (using the mech) and let the air out of your shock,you then compress the suspension to make sure there is still some slack at full compression. This is to allow for chain growth which can be significant depending on your suspension type.
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#3
I am running a triple so will go round the big and little without the mech.  Then onto the joys of indexing...  Sad

My rear suss looks like this <!-- m --><a class="postlink" href="http://www.pinkbike.com/photo/2006517/">http://www.pinkbike.com/photo/2006517/</a><!-- m -->
Ride the Spiral to the end
It takes us to where no ones been
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#4
<!-- w --><a class="postlink" href="http://www.parktool.com">www.parktool.com</a><!-- w --> has a great guide, but it'll basically tell you to do what Sailor said

Well worth a look whenever you get stuck as it has loads of stuff on there
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#5
You need to go round the
big front and big rear without the mech, then add two full links (4 individual sections)
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#6
I did this and the chain was far too slack for my liking....  Undecided   So I shortened until I was happy.

If full suss, ensure you have enough movement in there for when compressing.
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#7
&quot;BMJBOY&quot; Wrote:I did this and the chain was far too slack for my liking....  Undecided   So I shortened until I was happy.

If full suss, ensure you have enough movement in there for when compressing.

Unless you have an I-drive.  Wink
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#8
[quote=&quot;]Assuming you are running a triple, wrap the chain around the big ring front and big ring back without going through the mech, then add 2 links and join together.[/quote&quot;]

+1 Easiest method by a long shot Wink
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#9
Why not just count the links on the chain thats coming off? - Chains are the same link length so assuming the 1st worked the 2nd will at the same length?
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#10
I had considered counting the links from the existing chain however had been told by lbs that the chain was too short when thay checked my gears for me.  I went big to big and counted on an inner and outer, broke the chain there and put magic link in.  Park says to take the magic link into account so I may have it a link to long  Undecided

<!-- m --><a class="postlink" href="http://www.parktool.com/images_inc/repair_help/chain-2spkt2.gif">http://www.parktool.com/images_inc/repa ... 2spkt2.gif</a><!-- m -->
Ride the Spiral to the end
It takes us to where no ones been
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