KMC 10spd chain too long....

Silly Old Hector
Silly Old Hector Posts: 573
edited April 2013 in Workshop
I bought a KMC 10 sp chain and was going to quickly swap over yesterday. It appears to be about 7 links longer than the existing Shimano chain fitted.

No problem, other than I had run out of time last night (cleaned 3 mtn bikes and my Focus :roll: ) and had to refit the old chain ( cleaned :wink: ).

Bike is a 50cm Focus with 105/FSA compact.

Is this normal ?
All the gear, but no idea...

Comments

  • bondurant
    bondurant Posts: 858
    Yes, you have to shorten it to fit your setup.
  • Thanks - Does 10 Spd just refer to the link width ?

    Why would the chains vary so much in length, when the wheel size, chain rings and rear derailleurs are of a similar size across most makes ?

    Just Interested.
    All the gear, but no idea...
  • onbike 1939
    onbike 1939 Posts: 708
    Thanks - Does 10 Spd just refer to the link width ?

    Why would the chains vary so much in length, when the wheel size, chain rings and rear derailleurs are of a similar size across most makes ?

    Just Interested.

    The chain width depends upon the space between the sprockets and the rule is, 5,6,7,8 all use the same width and 9 a narrower one with 10 a narrower chain yet. I don't mention 11 as they are they are the work of the devil.
    Chain rings can vary widely in size and RDs can be short cage or long.
  • Thanks chaps - with all the variables, I see why KMC start them long, so you can customise.

    Will get the hacksaw out tomorrow :wink:
    All the gear, but no idea...
  • flasher
    flasher Posts: 1,734

    Why would the chains vary so much in length, when the wheel size, chain rings and rear derailleurs are of a similar size across most makes ?

    Really?

    Are you using a 53/52/50, 38/36/34 chain rings, along with a 11-23,12-25,12-32, cassette along with a short cage, medium cage or long cage rear derailleur? Plus chain stay length varies too.

    So many variables one chain length would never fit all?
  • andy_wrx
    andy_wrx Posts: 3,396
    Bikes are different sizes, Hector. And bikes with triple gears will need longer chains than with a compact. Etc, etc.

    So chains are supplied too long so you can cut them down to the size you need for your bike.

    You don't use a hacksaw, you use a chain tool (aka chain-splitter or pin-remover) to remove the pin and so shorten the chain
    See http://www.parktool.com/blog/repair-hel ... leur-bikes

    You are correct to count links rather than by length in inches/cm btw, your old chain will have stretched slightly.
  • I was joking about the hacksaw - I've got the big parktool to play with......
    All the gear, but no idea...
  • nicklouse
    nicklouse Posts: 50,675
    I was joking about the hacksaw - I've got the big parktool to play with......
    but you can not be bothered to read the fitting instructions that come with the chain. :roll:
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • bernithebiker
    bernithebiker Posts: 4,148
    Thanks chaps - with all the variables, I see why KMC start them long, so you can customise.

    Will get the hacksaw out tomorrow :wink:

    I fear this is not a joke....... :shock:
  • farrina
    farrina Posts: 360
    I was joking about the hacksaw - I've got the big parktool to play with......
    Thank goodness for that I almost choked on my coffee reading that .... :D
    Regards
    Alan
  • nicklouse wrote:
    I was joking about the hacksaw - I've got the big parktool to play with......
    but you can not be bothered to read the fitting instructions that come with the chain. :roll:

    Normally fastidious with boxes and instructions, but recent SWMBO-driven house clean-outs meant box/instructions well gone ( chain arrived about a month ago, when I thought spring would be here ), leaving chain sitting in a Jiffy bag :roll:
    All the gear, but no idea...