Can I use a chainring designed for 6/7/8 speed with a single speed, 1/8" chain?

The rear wheel only has a single cog - no derailleurs.

  • Does your rear wheel have one cog or multiples? Cos 1/8" chain does not work in a derailleur.
    – Criggie
    Aug 7, 2018 at 7:46
  • 1
    The rear wheel only has a cog.
    – Robert
    Aug 7, 2018 at 11:02

2 Answers 2


If you want to use a 6/7/8 speed chainring on a single-speed or internally geared bike I think that will be fine.

You can't use a 1/8" chain with a front or rear derailleur obviously.


Yes. You can use a 1/8" chain on a 7 speed freewheel. I'm running one right now on an electric folding 20x4 fat bike. It will work. I put a larger 60 tooth chain ring on front so I could more easily keep up pedalling at 20 to 28 mph (32-48 km/h).

I changed out the crank arms and had to use 2 chains put together to make it long enough due to the large chain ring, but yes a 1/8" chain Will work on a 7 speed freewheel and derailleur.

  • 2
    Welcome to SE - this is interesting, but doesn't answer OP's question which was about a singlespeed chain on a chainring intended for 8 speed, so the front end of the chain run, not the rear. You appear to know your stuff, so have a go at answering some other questions too.
    – Criggie
    Jan 23, 2021 at 22:27

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