Quote Originally Posted by Muirenn View Post
I have the Synapse carbon with 105 components. Great bike. And much more relaxed than the C'Dale Six. I also have lower back problems, and that is one reason I didn't consider the Six.
My previous bike was an aluminum Synapse (WSD). New bike is a unisex SuperSix. They feel REALLY different. I know I am going to love my SuperSix once I get more accustomed to the different feel and I wanted a more performance-oriented bike. But if I had ANY back issues I think I would have stayed with my Synapse. That bike felt pretty easy to ride right from the start and I was very comfy during the one century I rode (aside from the chip-seal vibrations, which was a big factor in me switching over to carbon).

One thing to consider is SRAM Rival, over 105. My previous bike had 105 components, new bike has SRAM. At this point I have 0 interest in ever going back to Shimano. I find the SRAM to be much more intuitive and reliable, so far. I think the hoods and adjustable reach brakes fit my hands even better than the short-reach brakes/shifters on my Synapse did.