Chain length calculation?

hopper1
hopper1 Posts: 4,389
edited January 2010 in Workshop
I'm about to change my chainset, from a standard double (53/39) to a compact (50/34).
Rear cassettes from 23/11 to 27/12.
God only knows why I thought a Satndard Double would be good on a Winter trainer :roll: :oops:
How do I work out the new chain length?
I haven't been successful in finding any calcs for this.
Even if I don't need to adjust the chain length, I'd like the calculation, for future use... :wink:
Start with a budget, finish with a mortgage!

Comments

  • APIII
    APIII Posts: 2,010
    My unscientific method is to put the new chain on the small ring at the front and the smallest gear on the rear and take out enough links so the chain just clears the derailleur cage.
  • ravey1981
    ravey1981 Posts: 1,111
    http://www.parktool.com/repair/readhowto.asp?id=26
  • skellator3
    skellator3 Posts: 200
    no normal calculation is large front ring to large rear plus 2 links,
    dont only ride a bike
  • redddraggon
    redddraggon Posts: 10,862
    APIII wrote:
    My unscientific method is to put the new chain on the small ring at the front and the smallest gear on the rear and take out enough links so the chain just clears the derailleur cage.

    +1

    That is by the far best way, and is used by the most intelligent people.
    I like bikes...

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  • hopper1
    hopper1 Posts: 4,389
    redddraggon wrote:
    APIII wrote:
    My unscientific method is to put the new chain on the small ring at the front and the smallest gear on the rear and take out enough links so the chain just clears the derailleur cage.

    +1

    That is by the far best way, and is used by the Welsh (the most intelligent people).

    Sorted that for you redddraggon :wink:
    Start with a budget, finish with a mortgage!
  • Smokin Joe
    Smokin Joe Posts: 2,706
    This works -

    http://www.machinehead-software.co.uk/b ... hcalc.html
  • John.T
    John.T Posts: 3,698
    hopper1 wrote:
    redddraggon wrote:
    APIII wrote:
    My unscientific method is to put the new chain on the small ring at the front and the smallest gear on the rear and take out enough links so the chain just clears the derailleur cage.
    +1
    That is by the far best way, and is used by the Welsh (the most intelligent people).
    Sorted that for you redddraggon :wink:
    Not just the Welsh. We do it the same way up here in Gods country.
    My Fleet.
  • hopper1
    hopper1 Posts: 4,389
    John.T wrote:
    hopper1 wrote:
    redddraggon wrote:
    APIII wrote:
    My unscientific method is to put the new chain on the small ring at the front and the smallest gear on the rear and take out enough links so the chain just clears the derailleur cage.
    +1
    That is by the far best way, and is used by the Welsh (the most intelligent people).
    Sorted that for you redddraggon :wink:
    Not just the Welsh. We do it the same way up here in Gods country.

    Must be the sheep :shock:
    Start with a budget, finish with a mortgage!
  • redddraggon
    redddraggon Posts: 10,862
    hopper1 wrote:
    redddraggon wrote:
    APIII wrote:
    My unscientific method is to put the new chain on the small ring at the front and the smallest gear on the rear and take out enough links so the chain just clears the derailleur cage.

    +1

    That is by the far best way, and is used by the Welsh (the most intelligent people).

    Sorted that for you redddraggon :wink:

    I'm glad that you agree we are the most intelligent.
    I like bikes...

    Twitter
    Flickr

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