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Thread: Bike Chain Size

  1. #1
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    Red face Bike Chain Size

    Dear All,

    http://www.youtube.com/watch?v=3XwL85Qgf9U

    Inspired by this videos i have started to build my own electric bike.

    Please can you advise what Chain size have you used for this bike.

    I believe it is not a standard bike chain.

    Thanks for your help.

    sorry for any inconvenience.

  2. #2
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    Hello, bikeman1684.

    You may want to try ebikes.ca and their stokemonkey: http://www.ebikes.ca/store/store_stokemonkey.php

    You can also adjust any bicycle chain by removing one or more links.


    If we don't make changes to our use and abuse of energy, Mother Nature will make it for us.
    Be a part of the solution to Climate Change instead of a contributor.

  3. #3
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    To explain the problem bit more. I brought a kit from BHT Diffusion and discovered that the chain supplied by them with the kit is small. Hence I had no option but to replace it.

    The chain supplied by them is TJC Link chain 1\2" 1\8" with pin length of ' 8.7 mm '.

    The closest to it i can find is bmx single speed Chain
    Specification is 1/2" x 1/8" with pin length 10.7 mm

    Please can someone advice what is Pin length and that different pin length makes any difference.

  4. #4
    Senior Member chas58's Avatar
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    for width: 1/8" chains are used on single speed & fixed gear (includes BMX), while 3/32 is used on most 6-7-8 speed rear cogs. I think it is smaller for 9, and 10 speed cogs.

    You can use a 1/8 chain on a 3/32 sprocket, but a 3/32 chain will not fit on a 1/8 sprocket (cog). Is that your problem???

    From Sheldon brown:

    • 1/8" (0.125", 3.18 mm) chain is used on most single-speed bicycles, and bicycles with internal gearing.
    • 3/32" (0.094", 2.30 mm) chain is used on derailer equipped bicycles that have more than 3 cogs at the rear.

    and more: http://sheldonbrown.com/chains.html

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