A friend of mine recently purchased a 90's model cannondale r400. Since i am new to road biking i have never seen the component group on this bike which is Shimano RX100. I was just wondering if this group is equivalent to like Sora or Tiagra or what its comparable to. For what its worth the bike is in decent shape for the $150.00 my buddy paid for it. I think the frame is a 56cm because its a bit big for me but when i lifted it it seemed to be lighter than my 2004 specialized allez triple, but it's hard to say for sure. An info on this componet group is greatly appreciated.

Thanks, Al