Author Topic: MK rear chain  (Read 877 times)

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Offline tck

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MK rear chain
« on: 21 Mar 2021 at 15:57 »
Some chain that came with my mongrel Douglas looked correct, was not excessively worn and fits on a short run of sprocket front or back. But when wrapped around the rear sprocket for half the circumference it started to rise up above the teeth  Nominally 1/2 pitch  the width? of the standard chain is stated to be .305" ( I am unsure where that measurement is made) The chain that rode up had a pitch of around .485" and an inner link with is about the same at 485".  interestingly I found a length of chain that does seem to fit and it has a pitch of .448" and a inner chain link width is again the same at .448  but I cant see a .305" dimension anywhere...

Offline Dads bike

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Re: MK rear chain
« Reply #1 on: 21 Mar 2021 at 16:20 »
I am no expert on chains but this guy is and is more than happy to give advice.
Jason 01299 212626

All the best

Offline eddie

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Re: MK rear chain
« Reply #2 on: 21 Mar 2021 at 20:15 »
       The standard size chain for the Mark series is 1/2"pitch x 5/16" wide. The .305" figure is the thickness of the sprocket for that size of chain.
  The chain you have with the .485" pitch is probably some worn 12mm(.472") pitch metric chain.