I tried to replace the chain on my 10 speed Nishiki road bike but now it skips like crazy on the cassette. The new chain is an sram pc850 which I assumed was ok for this application. I just took what the bike shop gave me really. The teeth on the cassette are not worn. The teeth on the cranks are only slightly worn, cranks are Sugino made from that soft alloy. The new chain seems to mesh well so Im not sure what the problem is.

This bike is a Nishiki competition I believe the year is 1979.The driveline has given me nothing but grief lately.