I have an 1984 Colnago Nuovo Mexico road bike with a double Super Record chainring set and a six cog Shimano Dura Ace freewheel. I replaced the original chain with a Schram chain and I get some chain rub on the inside of the front derailleur cage when in cog 1 and cog 6. I can trim this out using the front derailleur shift lever, but it's kind of annoying. Is this a chain size problem and if so, what chain should I be using?
Tsapp