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Trying to work out what chainring I will need to run a 1x5 set up
Best bet is to run an 8-speed chain, not many modern dérailleur chains are wider than that since 8-speed chain works on everything that's 3/32". Don't use a 3/32" singlespeed chain; even though most of them will fit through the gaps in a 5-speed freewheel, they won't shift nicely like a modern dérailleur chain will.
I wouldn't fret about whether the chainring is 3/32" or 11/128", half the old so-called 3/32" 5- to 8-speed rings were narrow enough to take 11/128" 9- to 11-speed chain anyway.
Internal width of a 5 speed chain? 3/32?
Trying to work out what chainring I will need to run a 1x5 set up.
Am I also right in thinking that any friction shifter will work well up to 7 speed?