I am in the market for a cyclocross bike, I intend to leave it at my farm property 75 miles from where I live. I have a 2013 Specialized Sirrus Elite, 58cm, and a 2014 Specialized Secteur Elite 61cm. My question is, the same bike shop sold me both bikes. Why is there a size difference in the 2? I really like my current shop, but they tell me I need a 61cm for a cyclocross bike. I will use it for some gravel and paved road down at my farm. Anyone have this discrepency in bike size? I found a great deal on a 58 cm bike at another shop, but looking for opinions on this. I am 6'1" tall. Thanks for your input.
Pat