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jeff80
falconvitesse
I was quick to assume that the slipping drive train was related to the Simplex derailleur, however I have been messing about with the setup today and have come to the conclusion that the chain is the problem. The two chains I tested where both modern and designed for 8 speed?
At the top end of the freewheel there is no slipping but as you work your way down the cogs the slipping gets worse.
I went to my LBS earlier and bought a "KMC narrow". Hopefully this will end my pain.