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FD - the initial cable tension.

  • 21-05-2013 10:28am
    #1
    velomelo
    Registered Users, Registered Users 2 Posts: 74 ✭✭


    Can anyone answer my question please.

    When I replace the derailer cables (F & R) what initial tension should the cable have - before any adjustments with all the barrel adjusters on neutral setting too? Should I pull the cable as hard as I can and then secure by tightening the bolt ? Or should I apply no force and secure the cable while its "neutral" ? It always puzzeld me and I think this could have some impact on shifting and if it can be quite loose when derailers are on the smallest rings.

    Thanks


Comments

  • #2
    Unregistered.
    Registered Users, Registered Users 2 Posts: 3,532 ✭✭✭Unregistered.


    I done this recently. Make sure you have "reset" all the barrel adjusters first!


  • #3
    seamus
    Registered Users, Registered Users 2 Posts: 68,317 ✭✭✭✭seamus


    There are a few ways of doing it. If you have a barrel adjuster anywhere along the cable, screw this out by four or five turns before installing the cable. Stick the shifter into the lowest gear and then pull the cable taut before tightening the screw. Don't pull it as tight as you can, just so that there's no slack in the cable.

    The reason you've turned the barrel adjuster out a bit is so that if you've pulled it too tight, you can let some slack into it. But usually you have to take some slack out. So use the barrel adjuster to take all of the slack out of the cable. The cable should not be slack in the lowest chainring at all. If there is slack in the cable, it means that when you push the shifter, all you're doing is taking up slack rather than moving the derailleur and your gears will be unresponsive.

    An alternative method which I have used in the past is to put the shifter into the highest gear, and then pull the cable as hard as you can, which should force the derailleur to change to the highest chainring. Secure the cable in place, and then use the barrel adjuster to adjust the position of the derailleur to where it should be. Once configured correctly for the big ring, it should then work correctly for the others.


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