After pounding the pavement for forty years, a recent knee surgery has me convinced to get into cycling. Under the recommendation of Tom Stormcrowe, I'm soliciting this subforum for advice. I'm trying to figure out what type of cycling would be the easiest on my knees. Any suggestions would be most helpful. I'm starting from scratch here. I'm 6'3", 195 lbs, in decent shape, although the last few weeks have been rather sedentary.