comments:
That chainring situation looks a bit urgent to me. Urgently needs to be replaced with this pink crankset: https://www.ebay.com/itm/177945713398 In all seriousness, I don't think that would work. That's kind of an oddball Octa-Link crankset. This pink chainring would fit: https://www.amazon.com/Folding-Chainring-Sprocket-Crankset-Cycling/dp/B0H1GV6GQ4/ But it's designed to be used as a single front chainring, without a front derailleur. You can just replace the big one with a vintage one or any 130bcd chainring. But that is a long cage derailleur. You should find somewhere to check the chain and casette wear, since the front chainring is worn, the rest of it might be work as well. If that's the case you could get a wider range casette and use that pink chainring. But I'm probably more invested in this idea than you are. You could also just get a wider range casette, a new chain and stick with the (40 tooth?) middle chainring most of the time, that would be enough gears for the vast majority of riders! Also, just to briefly mention, the crankset you already have is quite nice, and it tends to be very difficult to match colors of bike parts especially pink.