I am in need of a city/road bike, however I'm concerned because I have some knee problems. Long story short, my kneecap is not totally sitting in the groove that it's supposed to, so I need a bike that will put the most amount of exertion above my knee and little to no exertion below my knee. Do any of you have any experience riding bikes with knee problems? Any suggestions for what kind of design I should be looking for? Is this even a thing I can hope to find? Please pardon my total ignorance of the biking world, this is my first one!