I was wondering about how I would go about upgrading components on my bike. I get dismall shifting from my Sora shifters ect. (it's on a trek 1000) What would you guys recommend doing? Is it possible for me to upgrade one component at a time? I'm too the point were I think I'd rather have friction style shifter because I can't achieve gear combinations that should be attainable. I've tried adjusting my derailers and I just am not getting results. Should I try adjusting them again, or?

Any help would be appreciated.

Thanks,
Andrew