I have no idea I just read your sentence and it was greek to me. I just bought it. It is a 2013 7.6 WSD, I wanted the flat bar instead of the bar that is usually on the road bike. I road home with a total grin on my face it was like it was made for me. I was looking for a new bike and I love purple so I bought her. I couldn’t believe I paid what I did for it but I love love love it. I think when you reach 50 you should spoil yourself. She is my christmas present. This summer I WILL do my first century ride. Oxon Hill Bike Club here I come.