Did my first 50K today I did my first 50K today (31.2 miles) and though it wasn't  particularly fast (15mph) or difficult (964ft of elevation), it felt really good.  I have no doubt that I could have gone further.   It was also my first ride with a cadence meter and it showed me that perhaps I am riding with too low of cadence.   It said my average cadence was 64.  Does that seem low?