• I'd be surprised if anyone still makes 1 inch pitch chains.

    Technically, they weren't 1 inch pitch but 1/2 inch pitch with every other link being solid, i.e. without a space between the side plates for the tooth to sit in. They were favoured by track racers as it was thought that it produced a stiffer and thus more responsive chain. From the side they look the same as ordinary chains unless you look carefully.

    A bit like oval chainrings - a passing fad.

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