I currently use a double crank 50/36 on my cyclocross. I feel I might need a triple so that I will have the extra granny gear to get me up the hills. So far the double is good but I now realize that with a little more effort in thrusting my legs down through the pedal stroke it will give me more steam up the hills. The problem here is I borrowed the double crank off my road bike so I could get the cyclocross on the road. Also, the triple cranks I find harder to shift the double is more manageable for me. Thanks in advance for your thoughts.