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5 arm, probably not as duo setup didn't really come until 4 arm (end of 90s and then really not until mid/late 00s for dual setups iirc.)??BTW - retrobiker - just to clear up a point of confusion I noticed in some of your earlier posts:
narrow wide chainrings are ONLY for 1x setups - do NOT get one of these for any setup where you need to actually shift the front!
the whole point of them is to keep the chain nailed on to a single chainring
But it was just something to think about.
Stick to TA etc and should be good.
Or just buy a new cranks with the rings on it,
A nice 36/22 here for 35 quidish.
https://www.chainreactioncycles.com/shimano-m315-36/22-c/s-00-709135#colcode=70913503Gives a more useful range and you already have the V. big ring at the back.
(may need new BB if different length, check specs)