Glad to see there are so many happy Sirrus owners! I hope to become one myself, but there's an issue. I purchased a 2017 Sirrus Elite last month and immediately had problems. Specifically, the chain is making contact with the front derailleur in every gear when on the big cog, no matter what setting the derailleur is on. I took the bike back to the LBS and they "adjusted" it. Upon test riding it in the parking lot, when the chain was on the small cog it seemed fine, but when on the big cog there was no change. The LBS indicated there wasn't anything else they could do and I left disappointed. The following day, I tried riding the bike at home and decided that I could not put up with the noise. Upon making a closer inspection on what might be causing the issue it looked to me that as the large cog rotated, the chain suddenly shifts/oscillates from side to side enough to contact the derailleur over half its rotation. By comparison, the crankset on my 1995 Specialized Hardrock Sport also oscillates slightly, but not enough to contact the derailleur.
So, a few days later I brought the bike back to the LBS and told them that I thought the cause of the problem was that the crank may be out of round. It was mentioned to me then that Specialized has been having problems with the FSA cranks. (As a side note, the 2018 Sirrus Elite uses a Praxis crankset and bottom bracket and not FSA components.) The LBS wrote up a work order to inspect the bike further and they committed to contacting their Specialized rep for options to solve the problem.
Two weeks later, I was contacted by the LBS that my bike was ready to be picked up. When I pressed them for what was done, they indicated that they 'straightened' the crank, but they did not seem certain that the problem has been solved. It was also mentioned that another option might be to switch out the FSR crankset at cost, but to what or how much was not said.
Please note that if you've read this post to this point, this is not a rant on the manufacturer or the LBS. Tomorrow, I'll be going to the shop with mixed emotions. On the one hand, it seems to me that if bike is defective, perhaps it would be in my best interest to return it for a refund. On the other hand, I wanted to have the same positive experience with this bike as those of you have had with your Sirrus bikes. Frankly, I'm skeptical that the 'repair' will work and that the option of replacing the crankset will include charging me for the parts. If a proper fix is to replace the crankset, shouldn't the cost be covered by the manufacturer? Well, I hope to have more answers tomorrow.