Cadence is a personal thing. I have found it easier since my cadence went up but No real problems when it was lower. I know that in my case- I try to ride at about 90. Steep hills will drop me down to around 70, and If I have to drop down to 60- then I am beginning to feel it. Below 60 and my legs are straining too much. Yet there is a rider in our group that has a cadence so low (Around55) and he is not the slow one.