I do have the Shimano 105 derailleur set. I"m currently waiting for a response from Felt to get the exact year. I do know that the bike is model year 2011 or newer. The bike is in great shape and was only sold because the guys son out grew it. I did a full tear down on both hubs to clean and grease. The cassette is in great shape and the chainring is good. I assume the chainrings wear quicker because they aluminum? @ Adrianfly I checked out the Campagnolo sets and they are awesome! Definitely something I will keep in mind for the future.