It is really your own opinion. Ernie has the 11.5 and is about your wieght. He rides 90% solo and his bike looks great. I choose to go with the 12.5 because I ride 90% 2-up and I was concened with dragging. I do drag a liitle with the 12.5 however, not as bad as I did with the stock shocks. These shocks are great, I reduced my ride height by 1/2 in and I do not drag as bad as I did with the stock shocks.I am very happy with the ride height, it lookslower and is still practical. I could not have gotten the 12in for my weight application and riding habits. If you want to play it safe, you will be satisfied with the 12 in. Many people have reduce their ride height by 1 in with minimal problems. If you have any other questions, call the above # and speak with a tech. They are nice people and will answer any of your questions.