My touring/commuter bike is an old 1992 Rocky Mountain Hammer with Sun Tour XC/LTD components and I am wondering what I can upgrade/replace them with. I will be replacing the chain this week and I am wondering if I will have any compatibility problems. In addition, I will be taking this bike on a long tour of Europe this winter and I would like to know what I could use for replacements such as Shimano or Campy if a problem occurs.

Thanks
Gordon P