I searched the archived posts and couldn't find anything that answered my specific questions. In a trade I got a pair of Bontrager Wheels along with a SRAM 9-speed cassette and a SRAM chain. These items were supposed to have been ridden on once or twice and they look brand new. I want to use these to replace a Shimano 9-speed cassette and chain that I now have on my bike. How does SRAM stack up against Shimano? Does anyone foresee any problems using my Shimano 105 series derailers and Shimano front chainrings with the SRAM components? My current chain has less than 200 miles on it. Would it be better to use the SRAM chain with the SRAM cassette or can I still use my Shimano chain? I heard from a not-always-reliable source that all SRAM and Shimano components were interchangeable. Is this true?