|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
trimming and installing a dura ace chain
I am stuck with a trivial task. I have a new Dura Ace 10 speed chain,
and the length I need is ~7 links shorter than what came. So I disconnected the 7 extra links by pushing a pin half way out. Then I was going to push that pin completely out , and to re-connect the chain with the "master" pin that came separately with the chain. The problem is that I can't push the existing pin completely out. I don't know how much force I am supposed to apply. I was trying to push so hard that I bent the handle of the chain tool. So now I at least need a new chain tool, may still need to go to a bike shop to have this simple job done for me, and I am not sure if I have damaged the $40 chain also. The Zinn book just says "push the pin out". 50% of my bike projects end up like this. Is there anything special about Dura Ace chains, like, the pins being especially strong? I did not have trouble with Ultegra chains. |
Ads |
#2
|
|||
|
|||
trimming and installing a dura ace chain
|
#3
|
|||
|
|||
trimming and installing a dura ace chain
|
#4
|
|||
|
|||
trimming and installing a dura ace chain
If your chain tool is similar then you may have got to the end of the threads and have been overtightening the tool without actually pushing the pin any more. This is probably what's happening, I haven't thought about it. Having said that, I think these instructions might also have said you use the old pin as a guide for the master pin. So you put the chain back together as if you were going to reuse the old pin, push it some of the way in, add the master pin behind it, and push the whole lot through. The old pin then pops out of the other side. I may have mis-remembered this though, but it sounds plausible. Sounds plausible to me, too. I wil try that. BTW the chain instructions did not say anything regarding how to deal with the old pin, they only tell how to push in the new one. Thanks !! |
#5
|
|||
|
|||
trimming and installing a dura ace chain
|
#6
|
|||
|
|||
trimming and installing a dura ace chain
|
#7
|
|||
|
|||
trimming and installing a dura ace chain
All right. Pushing the "old" pin out with the power pin is the key.
Here is what worked: - remove the old chain - easy - whipe the new chain - compare the new chain side by side with old one. The new chain is longer by N=~10 links (I have a compact crank). Mark the pin on the new chain that you want to disconnect - install the new chain on the bike (small ring, small cog) - from the outside, push out the marked pin with the chain tool until the pin is held only by the inside link. Disconnect the extra ~10 links - Push in the power pin that came with the new chain, using the power pin to completely push out the old pin. Takes 10 min if done right. |
Thread Tools | |
Display Modes | |
|
|