I have been wondering about cadence vs speed and which one I should be concentrating on more for a couple of weeks now. I have pretty good cardio as I typically run 4-5 days a week and bike 90-100 miles over the weekends. I find that when I ride at a higher speed, but a lower cadence I tend to wear out quicker and my rides typically end closer to the 40 mile mark. When I ride at a slightly lower speed, but higher cadence I find I can go for a longer period of time and can get in 50 miles.

I want to work on increasing my distance (but I also want to work on increasing my speed as well) so from what I am gathering here it seems that my concentration should be on keeping my cadence higher as I will draw upon my cardio reserves vice my muscular reserves. Am I on the right track with my thinking?