Lately I have been getting a pain in my right knee while cycling. It happens in the downstroke and its a sharp pain, but not unbearable, coming from the middle to back of the knee. Other times it feels like I have an air pocket in the middle of my knee if you know what I meen. And other times it feels like I need to pop my knee really bad, which sometimes it does.
Is this bad? I have been riding my single speed for a while and just started back on my road bike, could it be the single speed, the thing does have a big gear that I usually hammer on (56x16).