"It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle."
Ernest Hemingway
email me if google hasn't got the answer..
Why would you even consider Shimano/SRAM when you have a choice..
Sure Shimano Durace may be efficient & SRAM RED maybe light, but neither have the total papckage.
Just my opinion..
(Taken with Instagram)