I think I may be riding too fast or to much. I'm trying for 12 miles r/t and having the hardest time. I can ride 6 miles fine but when its time to head back home...I'm not pleasant Really I curse and b*tc*h and I'm hurting. I work 12 hour days so it might be part of the situation? I'm also very heavy and out of shape. So my plan is this ....ride in Monday and bring home Tuesday ....Ride in Wensday and bring home Thursday. If you can think of how I can do other wise,please chime in.