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Old chains, innit
http://www.classiclightweights.co.uk/extras/inch-pitch-block-chain.html
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Less friction
Block chain has more friction than roller chain, that's why we switched. Wippermann make a bike-sized 1" pitch roller chain which might be fun to experiment with, but chordal action would be pretty bad on a 7.5 tooth sprocket.
stevo_com
gbj_tester
@Sig_Arlecchino
What's the deal with skip-tooth chain rings? Less friction I guess, are there any other advantages? Why was the concept abandoned?
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