Size of chainring

[bigfella]

Hi there, I have an old Surgino GT crankset that I am going to use for my fixie project. How can I tell if its 1/8" or 3/32"?

 

[PpPete]

If you've an old bit of chain from a derailleur equipped bike (which will be 3/32") - try to put it round a section of the chain ring. If it don't fit your chain ring is 1/8"

 

[bigfella]

Thanks, turns out its 3/32".